Journal articles: 'Slip casting Technique'

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Amat, Noor Faeizah, Andanastuti Muchtar, Norziha Yahaya, Mariyam Jameelah Ghazali, and Chin Chuin Hao. "Comparison between Slip Casting and Cold Isostatic Pressing for the Fabrication of Nanostructured Zirconia." Advanced Materials Research 896 (February 2014): 335–38. http://dx.doi.org/10.4028/www.scientific.net/amr.896.335.

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Consolidation of ceramic parts may be achieved by several techniques, including the slip casting and cold isostatic pressing (CIP) methods. In the present work, the performances of the two methods are compared in the fabrication of nanostructured zirconia compacts for dental crown applications. First, a zirconia suspension suitable for slip casting was prepared. The rheological properties of the zirconia suspension were optimized by adding a dispersant agent and controlling the pH. Zirconia slurries were then slip-cast into a pellet. Second, another group of zirconia pellets were fabricated using uniaxial pressing and were then cold-isostatically pressed. Both slip-cast and CIP samples were sintered at 1300 °C with a soaking time of 2 hrs. The mechanical properties of both samples were compared. The samples prepared by slip casting were denser compared with those prepared via CIP. Slip casting technique produced samples with 98.8% of the theoretical density, which resulted in the high Vickers hardness (11.4 GPa) of the slip-cast samples. Morphological studies revealed that the microstructures of the slip cast-sample were more homogeneous and contain no porosity. The formation of such a structure is due to the enhancement of the particle packing efficiency by slip casting as well as to the removal of larger agglomerates by colloidal processing prior to casting. As a consolidation stage, slip casting appears to be more suitable than the CIP technique in preparing reliable nanostructural ceramic parts.

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Xu, Qian, Brian Gabbitas, Steven Matthews, and De Liang Zhang. "Optimisation of Performance of Dispersants in Aqueous Titanium Slips." Key Engineering Materials 520 (August 2012): 330–34. http://dx.doi.org/10.4028/www.scientific.net/kem.520.330.

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Slip casting is a well-established ceramic casting technique used for large scale fabrication of ceramic products with complex shapes. A homogenous slip with a desired level of stability is required, which is controlled using a dispersant. This paper describes the selection and optimisation of various dispersants used to produce Ti powder slips. A consideration of the effect of concentration and pH of the solvent on the dispersion of anionic polyelectrolyte dispersants (Dispex N-40, Synthecol SD375 & Dolapix CE64) was examined by measuring the sedimentation height and rate, the streaming potential and the slip viscosity. It was found that Dolapix CE64 showed the best deflocculating effect at 0.3dw.% with pH of 7. In particular, the measurements on Dolapix CE64 gave consistent results. This indicated that Dolapix CE64 is an effective dispersant in the preparation of a titanium slip.

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Blazutti Marçal, Rubens Lincoln Santana, Daniel Navarro da Rocha, and Marcelo Henrique Prado da Silva. "Slip Casting Used as a Forming Technique for Hydroxyapatite Processing." Key Engineering Materials 720 (November 2016): 219–22. http://dx.doi.org/10.4028/www.scientific.net/kem.720.219.

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Ceramic materials have particular properties when compared to other classes of materials, exhibiting poor ductility as an example. Slip casting is a widely used ceramic forming technique, and already established in the literature and in the ceramic industry. This study aims to present slip casting as a processing route for producing hydroxyapatite (HA) struts, and show the thermal phase stability. The ceramic suspension was produced and stabilized with hydroxyapatite powder, deionized water and polyethylene glycol 400. The slip was poured into gypsum mold. The green bodies were heat treated at 900 and 1100°C. Hydroxyapatite was the only phase present in all samples, before and after heat treatments. Density measurements showed that the densification was higher for the ceramic bodies sintered at 1100°C, when compared to the ones calcined at 900°C.

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Ahmad, K., and J. J. Mohamed. "Product Comparison between Local Product and Technology Aided Mambong Pottery." Journal of Tropical Resources and Sustainable Science (JTRSS) 4, no. 2 (August 13, 2021): 72–74. http://dx.doi.org/10.47253/jtrss.v4i2.608.

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There are various traditional Malay potteries such as Labu Sayong, Buyung and Terenang. Kelantan traditional pottery known as Mambong. The objectives of this research are to compare and characterize the density, strength, physical appearance and shrinkage of traditional and slip casted Mambong pottery. Traditional Mambong pottery has been brought from the potter at Mambnog village and slip casted Mambong pottery is made by using slip casting method. Density of sample is measured by using Archimedes principal. Traditional Mambong pottery show the higher value of density compared to slip casting Mambong pottery. The average value of density for traditional Mambong pottery was 1.763 g/cm3, while the average value of density for Mambong pottery that was fabricated via slip casting was 1.461 g/cm3. Due to the presence of iron in clay, the colour of Mambong pottery changes from brown to reddish-brown after firing process. Traditional Mambong pottery shows the higher percentage of dry shrinkage which was 9.76 % compared to slip casting Mambong pottery which was 5.72 %. Traditional Mambong pottery also shows the higher percentage of fired shrinkage which was 1 % compared to slip casting Mambong pottery which was 0.58 %. In conclusion, by using slip casting technique, density, physical appearance and shrinkage of pottery can be improved.

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Fernandes, Rodrigo Sampaio, Elson de Campos, Jerusa Góes Aragão Santana, and Rogério Pinto Mota. "Porous Ceramics Obtained by Slip/Starch Casting Consolidation Method (SSCC)." Materials Science Forum 881 (November 2016): 52–57. http://dx.doi.org/10.4028/www.scientific.net/msf.881.52.

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Slip/starch casting consolidation (SSCC) is a technique for obtaining porous ceramics, which joins the forming process by starch consolidation with the slip casting method. In this work, a slip which contains ceramic powders, starch and dispersant, is poured into a porous mold and is taken to an oven so that the gelling process occurs. After sintering, it is noticed that the ceramics show different characteristics from the ones obtained exclusively by slip casting or by starch consolidation. Alumina ceramics were produced by using the three methods presented in this work. The ceramics were characterized by apparent porosity, mechanical resistance and scanning electron microscopy. The ceramics produced by SSCC presented the highest mechanical resistance value (289 MPa), while the ones produced by starch consolidation and slip casting presented values of 126 MPa and 191 MPa, respectively.

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Mahamad Sahab, Abdul Rahim, Nor Hayati Saad, Farrahshaida M. Salleh, Azlin Hamidi, Doll Said Ngah, and Wan Dung Teng. "Integrated Process of Ceramic Slip Using Rotating Technique." Advanced Materials Research 1133 (January 2016): 161–65. http://dx.doi.org/10.4028/www.scientific.net/amr.1133.161.

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Hollow shape product from ceramic material is produced generally by slip casting technique. This conventional technique is widely used in ceramic industries. Ceramic slip compound by rotating technique namely slip rotary moulding process is studied for producing the hollow shape green ceramic product. From experimental studies this advanced technique has exemplified high potential in producing green hollow shape ceramic product for mass production. Laboratory test result shows that the rotating technique is able to produce hollow shape green ceramic product with desired thickness and sufficient green strength (1 MPa) able to hold during de-moulding process.

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Sui, Jing, and Jiang Liu. "An Electrolyte-supported SOFC Stack Fabricated by Slip Casting Technique." ECS Transactions 7, no. 1 (December 19, 2019): 633–37. http://dx.doi.org/10.1149/1.2729146.

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Smirnov, Aleksey D., Anastasia A. Kholodkova, Viktor V. Rybalchenko, and Vadim P. Tarasovskii. "Porous Alumina-Bentonite Ceramics: Effects of Fillers and Molding Technique." Ceramics 6, no. 1 (January 10, 2023): 132–45. http://dx.doi.org/10.3390/ceramics6010009.

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In porous ceramics processing, the green body shaping technique largely determines the control of the final porous structure and material properties. The study is aimed at finding affordable approaches for the shaping of two different narrow-fraction fillers: F240 electro-corundum and hollow alumina microspheres. The results revealed the influence of accessible shaping techniques (semi-dry pressing, direct casting, and slip casting) on the structural and mechanical properties of porous alumina ceramics. The starting materials were characterized by XRD, SEM, EDX, and BET. The manufactured ceramics were studied in terms of microstructure, density, porosity, and flexural strength. Free stacking of the fillers’ particles during the direct and slip casting resulted in a higher porosity of ceramics compared with that of semi-dry pressing, while reducing its mechanical strength. Direct casting appeared preferable for ceramics with hollow microspheres because it maintained the integrity of the filler particles and preserved their inherent porosity in the ceramics. The optimal parameters for porous ceramics processing were determined as follows: pressing at 30 MPa and sintering at 1280–1320 °C with a bentonite content of 15 wt.%. In this case, the average density and open porosity of F240 samples reached 2.22 g cm−3 and 40.4%, while samples containing hollow microspheres reached 2.20 g cm−3 and 36.7%, respectively.

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Raju, Pittala, Papiya Biswas, Asit Khanra, Yabaluri Rao, and Roy Johnson. "Investigations on colloidal and dry formed alumina parts under pressure and pressure-less conditions." Processing and Application of Ceramics 16, no. 2 (2022): 160–66. http://dx.doi.org/10.2298/pac2202160r.

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Pressure assisted casting of advanced ceramics is an emerging preparation technique as it permits using a colloidal slips in shaping under pressure. Application of pressure provides flexibility in forming of complex shapes in combination with high homogeneity, superior green density, strength and high productivity. Current study compares conventional slip casting (CSC), pressure slip casting (PSC) and cold isostatic pressing (CIP) used for preparation of alumina green bodies. Since particle size is a limitation in PSC process due to the defined pore size of the mould, the same starting alumina powder obtained by mixing of powders with two different average particle size (7 ?m and 1.43 ?m) in the proportion of 65:35 was employed in all three processes. Green densities of 65%TD at 35 bar in case of PSC and 66%TD at 1200 bar after CIP were obtained; however, density of the CSC samples was only 50%TD. Flexural strength and fractographic studies were carried out and correlated with the respective processes. The samples were also sintered at 1600 ?C to evaluate their sinterability.

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Termizi, A. I. A., and J. J. Mohamed. "Fabrication of Mambong Pottery by Using Slip Casting Method." Journal of Tropical Resources and Sustainable Science (JTRSS) 4, no. 2 (August 13, 2021): 64–67. http://dx.doi.org/10.47253/jtrss.v4i2.606.

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Mambong pottery in Kuala Krai, Kelantan is one of the types of potteries in Malaysia other than Sayong, Terenang and Sarawak pottery. Mambong pottery was being made by traditional technique like pinching and throwing. In this research, Mambong pottery was made by using slip casting method. This method used porous mould which can absorb the water content from the clay slip. Different composition of water and clay was used and its effect on product properties was investigated. Samples with different composition of water and clay were labelled as 50C50W, 60C40W, 70C30W and 80C20W samples with addition of 0.7% of sodium silicate, Na2SiO3. The samples were characterized by its specific gravity (S.G.) of clay slip, drying and firing linear shrinkage, density and porosity and strength of the clay samples. Finding from this research showed that 70C30W sample is the optimum composition in fabricating pottery by using slip casting among other samples.

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Termizi, A. I. A., and J. J. Mohamed. "Fabrication of Mambong Pottery by Using Slip Casting Method." Journal of Tropical Resources and Sustainable Science (JTRSS) 4, no. 2 (December 30, 2016): 64–67. http://dx.doi.org/10.47253/jtrss.v4i2.715.

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Mambong pottery in Kuala Krai, Kelantan is one of the types of potteries in Malaysia other than Sayong, Terenang and Sarawak pottery. Mambong pottery was being made by traditional technique like pinching and throwing. In this research, Mambong pottery was made by using slip casting method. This method used porous mould which can absorb the water content from the clay slip. Different composition of water and clay was used and its effect on product properties was investigated. Samples with different composition of water and clay were labelled as 50C50W, 60C40W, 70C30W and 80C20W samples with addition of 0.7% of sodium silicate, Na2SiO3. The samples were characterized by its specific gravity (S.G.) of clay slip, drying and firing linear shrinkage, density and porosity and strength of the clay samples. Finding from this research showed that 70C30W sample is the optimum composition in fabricating pottery by using slip casting among other samples.

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Bakar, Nurul Ainon, Noruzaman Daud, Siti Mariam Mat Nor, Nik Maheran Nik Muhammad, and Julie Juliewatty Mohamed. "The Effect of Calcium Carbonate Added into Mambong Clay." Materials Science Forum 1010 (September 2020): 256–61. http://dx.doi.org/10.4028/www.scientific.net/msf.1010.256.

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Mambong clay is a traditional pottery that originally from Kampong Mambong, Kuala Krai, Kelantan, Malaysia. The new fabrication technique of this pottery is the slip casting technique. However, the innovation of Mambong pottery does not only limited to the fabrication technique, but also the materials used in the fabrication in order to improve its physical properties. Calcium carbonate (CaCO3) is one of the materials that can be used in this fabrication as an additive due to the ability to stabilize the clay soil and improves the clay physical properties. In this study, the various CaCO3 contents (0, 5, 10, and 15%) were investigated to get the optimum amount of CaCO3 to improve the physical properties of Mambong clay by using slip casting method. Mambong clay with different amount of CaCO3 addition was compared in term of microstructure, density, porosity, shrinkage, and flexural strength.

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Qasim, Tarek, Yeo Khee Wee, Wei Lun Cai, and Xiao Zhi Hu. "Contact Damage of Curved Multi-Layered Ceramics: Prepared by Slip Casting Technique." Key Engineering Materials 417-418 (October 2009): 461–64. http://dx.doi.org/10.4028/www.scientific.net/kem.417-418.461.

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Contact damage of curved multi-layered systems, consisting of a brittle zirconia (3Y-TZP)/Alumina (Al2O3) coating – prepared by slip casting – on a compliant polymeric substrate from indentation by a hard tungsten carbide sphere is investigated. The essence of this study is to compare the structural performance of layered ceramics, and monolithic ceramic in the brittle coating and compliant substrate of dental crown-like systems. The specimens are loaded at the axis of symmetry. The failure evolution to initiate cracking and final failure patterns in curved multi-layered specimens are compared to those of the single layer specimens of the same thickness and the same study are conducted again with the flat specimens. The onset of fracture is observed in situ using a video camera. It is demonstrated that in all specimens, cone cracking occurs prior to radial cracking, with the latter being defined as the primary mode of catastrophic failure. The multi-layered ZTA (Zirconia Toughened Alumina) specimens prepared by slip casting possessed a distinct final failure pattern in comparison with a single layer specimen. The results of this study provide useful guidelines for building brittle multi-layered coating systems with the functionally graded feature, and complex shapes with geometrical uniformity.

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Shiono, Takeshi, and Akitoshi Fuke. "Preparation and Mechanical Properties of ZrO2-WC Composites by Slip-casting Technique." Journal of the Japan Society of Powder and Powder Metallurgy 43, no. 7 (1996): 885–89. http://dx.doi.org/10.2497/jjspm.43.885.

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Deng, Bin, Hong Chen Liu, Yuan Fu Yi, Chen Wang, Ning Wen, and Jie Mo Tian. "Effects of Veneering Porcelain Type on Bending Strength of Dental Y-TZP/Porcelain Bilayered Structure." Advanced Materials Research 105-106 (April 2010): 524–27. http://dx.doi.org/10.4028/www.scientific.net/amr.105-106.524.

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The purpose of this study was to investigate the effect of different veneering porcelain types on the flexural strength of dental Y-TZP/porcelain layered structure. KAVO™ Everest zirconia ceramics were selected as substructure. To forming Y-TZP/porcelain bilayered structure, a leucite based veneering porcelain was fired on the zirconia substructures by slip-casting technique with dentin washbake, and two nano-fluorapatite based veneering porcelain was fired on the zirconia substructures either by slip-casting or pressed-on technique with or without liner coverage. Bending strength was tested according to ISO 6872 standard, and the veneered surfaces of fracture samples were analyzed by SEM. Experimental results showed that for covering KaVo™ zirconia core material, conventionally applied veneering slurry-porcelain combined with liner or wash firing has significant higher bending strength than pressed-on porcelain. SEM showed that the main failure type at the interface was adhesive.

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Boulesteix, Rémy, Cyril Chevarin, Rémy Belon, Alexandre Maître, Léo Cochain, and Christian Sallé. "Manufacturing of Large Size and Highly Transparent Nd:YAG Ceramics by Pressure Slip-Casting and Post-Sintering by HIP: An Experimental and Simulation Study." Materials 13, no. 9 (May 11, 2020): 2199. http://dx.doi.org/10.3390/ma13092199.

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This study reports the fabrication of Nd:YAG (i.e., Neodymium-doped Yttrium Aluminum Garnet: Y3-xNdxAl5O12) transparent ceramics of a large size by the pressure slip-casting forming technique. Colloidal suspensions of primary oxides (i.e., Y2O3, Al2O3, Nd2O3, and SiO2 used as sintering aid) were cast under pressure through a porous membrane. Cakes with a good microstructural homogeneity and mean pore diameter of 90 nm were obtained. Modeling of the pressure slip-casting process at the millimetric to centimetric scale based on a computational fluid dynamics simulation showed good agreement with experimental results in terms of the casting kinetics (i.e., cake thickness and fluid flow as a function of time) and cake permeability. As a result, it was possible to better manage pressure casting parameters in order to obtain large size and homogeneous green parts. Finally, transparent Nd:YAG ceramics sintered by vacuum sintering, followed by post-sintering treatment by Hot Isostatic Pressing (HIP), demonstrated laser slope efficiency (51.7%) and optical-to-optical efficiency (44%) with 130 mJ of output laser energy at 1064 nm equivalent to commercial single crystals.

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Islam, Md Fakhrul, Mehedi Hasan Rizvi, Towkir Ahmed Khan, and Muhammad Hasanuzzaman. "Development of Ceramic Candle Filters by Slip Casting Process." Key Engineering Materials 608 (April 2014): 85–90. http://dx.doi.org/10.4028/www.scientific.net/kem.608.85.

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A well-defined porous ceramic having effective pore size less than 1 µm was fabricated by slip casting technique which provides a low-cost and single-stage filtration process. This single-stage filtration process removed suspended solids and pathogenic organism. In this study, diatomaceous earth was used as pore forming agent in clay based ceramic body. Varied amount of diatomaceous earth was used with fixed proportion of china clay, ball clay and lime stone. X-ray fluorescence spectroscopy (XRF) was used to determine the composition of raw materials and final sintered filter body. In terms of porosity and flow rate, 25% diatomaceous earth shows better filtration property. It was found that total porosity increased with decreasing milling time. As the firing temperature increased, porosity decreased rapidly after 1100 °C. However, the change of porosity in firing range of 1000 °C–1100 °C was found very small. Mercury intrusion porosimetry was used to measure the pore size and its distribution. An effective intra-particle pores in a range of 0.2-0.5 μm was identified. Inter- and intra-particle pores were observed using scanning electron microscope (SEM). Microbial removalefficiency of 99.99% was measured, while water flow rate was found in a range of 200-700 ml/hour.

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Łada, P., P. Falkowski, A. Miazga, K. Konopka, and M. Szafran. "Fabrication of ZrO2-Ti Composites by Slip Casting Method." Archives of Metallurgy and Materials 61, no. 2 (June 1, 2016): 1095–100. http://dx.doi.org/10.1515/amm-2016-0184.

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Abstract Slip casting is one of the most popular shaping method in ceramic technology which allows producing a large number of elements in small period of time. This shaping technique gives a possibility to fabricate ceramic or composite materials such as ZrO2-Ti. Ti with its properties (low density, high melting point, high-temperature strength, good corrosion resistance and others) combine with ZrO2 (high flexure strength, high compression resistance and very high KIC) can be considered for different applications as constructional and functional materials. For the preparation of such composite nanometric zirconium oxide powder stabilized by 3 mol% Y2O3 and micrometric titanium powder were used. Water-based slurries with 35, 40, 45 and 50 vol.% solid phase content were prepared with 3, 10 and 15 vol.% addition of titanium powder. Zeta potential and pH of prepared slurries were considered. The pH changes were tested as a function of Ti content. The viscosity of the prepared slurries was measured. The sedimentation tests for selected slurries were performed. The casting rate for slurry of 35% solid phase with 10 vol.% Ti was examined. These measurements showed good stability of slurries. With the increasing of the solid phase concentration the density of the green bodies increased. However, the increase of the content of Ti powder reduced the density of green body samples. For selected samples the SEM observations was carried out. Composites produced by slip casting were characterized by a homogenous distribution of Ti particles in the ZrO2 matrix.

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Hardani, Hardani, Alpiana Hidayatulloh, and Lily Maesary A. "THE EFFICIENCY OF DYE-SENSITIZED SOLAR CELL (DSSC) IMPROVEMENT AS A LIGHT PARTY TiO2-NANO PARTICLE WITH EXTRACT PIGMENT MANGOSTANA PEEL (Garcinia Mangostana) WITH VARIOUS SOLVENTS." Jurnal Bahan Alam Terbarukan 7, no. 2 (December 27, 2018): 142–48. http://dx.doi.org/10.15294/jbat.v7i2.14488.

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The dye-sensitized solar cell (DSSC) is one of the photochemical electrical cells consisting of a photoelectrode, dye, electrolyte, and counter electrode. The purpose of using dyes in the DSSC is to extend the absorption spectrum to visible light because visible light has about 96% energy from sunlight. This article presents some experimental data on the nature of absorbance and the conductivity of natural dyes extracted from the plant as an application in the DSSC. Absorbance test using Spectrophotometer UV Visible 1601 PC and electrical properties test using Elkahfi 100 / Meter I-V. DSSC fabrication has been done using dye extract of mangosteen skin pigment (Garcinia mangostana) with a variety of coating technique of Spin Coating and Slip Casting. The results show that natural dyes from natural material extraction have an absorbance spectrum of 380-520 nm range and the greatest conductivity is owned by mangosteen fruit skin pigment (Garcinia mangostana). From the results of the test using AM Simulator 1.5G (100 mW / cm2) diesel simulator, it was found that the volume of TiO2 precursors affected the performance of DSSC solar cells and the overall conversion efficiency was 0.084% for the mangosteen skin dye by slip casting technique and 0.092% for the mangosteen skin dye by spin coating technique.

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Kaewtabut, Yutthana, Wansika Sirimongkol, Adisak Thueploy, and Siriphan Nilpairach. "Utilization of Rice Husk Ash and Waste Sludge from Cutting Glass Manufacturing with Angthong Pottery." Key Engineering Materials 608 (April 2014): 103–7. http://dx.doi.org/10.4028/www.scientific.net/kem.608.103.

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Efficiently utilization of rice husk ash (RHA) and waste sludge from cutting glass manufacturer (WSG) as additives to pottery clay would yield positive economic impacts, such as more friendly industrial ecosystems. In this study, The RHA and WSH were used as additives to Angthong pottery clay (APC) and casting and fired properties were examined. Two sets of sample with a mixture consisting of 60% APC, 20% RHA, and 20% WSG (CRG formula) and non-added clay (C100 formula) were prepared by slip casting technique. Samples were fired at temperature 900 °C and 1100°C; then the viscosity of slurry, linear shrinkage, water adsorption, and 3-point bending strength were measured. The results showed that the optimum viscosity for slip casting of CRG and C100 were 1638 cP and 983 cP, respectively. The water adsorptions of all samples decrease while their shrinkage and strength increase with temperature. At 900°C, the water adsorption and the strength of CRG were 32% and 1184 psi, respectively. Comparatively, CRG’s water absorption was 1.5 times higher than C100’s, while their mechanical strength was insignificantly different. This due to the RHA behaves as pore forming and the WSG promotes the sintering of samples.

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Beranič Klopčič, Sabina, Saša Novak, Tomaž Kosmač, H. G. Richter, and S. Hecht-Mijic. "The Preparation and Properties of Functionally Graded Alumina/Zirconia-Toughened Alumina (ZTA) Ceramics for Biomedical Applications." Key Engineering Materials 290 (July 2005): 348–52. http://dx.doi.org/10.4028/www.scientific.net/kem.290.348.

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Functionally graded alumina/zirconia-toughened alumina (ZTA) ceramics for biomedical applications were designed with a hard, wear-resistant alumina surface and a tough, zirconia-rich core. The main goal was to achieve an improved mechanical performance by introducing a residual compressive stress in the outer surfaces. Symmetrical, 7-layered samples were prepared by the sequential slip-casting of specimens from suspensions prepared at the inherent pH values, close to the pH values at which the maximum (negative) zetapotential was measured. No sintering or tunneling cracks were observed in the samples, but large defects, such as big agglomerates, air bubbles and large circular pores at layer interfaces, which resulted from preparing the samples using the slip-casting technique, were readily observed. The strength of the symmetrical composites is influenced by the presence of defects, which most probably originate from the shaping process. Therefore, the defects have to be regarded as the reason why the strength of the 7-layered composites is low.

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Sachidhananda, T. G., and V. Adake Chandrashekhar. "Electric Discharge Machining of Conducting Ceramics - A Review." Materials Science Forum 1019 (January 2021): 121–28. http://dx.doi.org/10.4028/www.scientific.net/msf.1019.121.

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Electrical Discharge machining (EDM) is a nonconventional machining technique, which has been widely used to produce dies and mold. Harder Materials can be machined into complex shapes as long as they conduct electricity. Recent advances in the technologies brought the development of new engineering materials, which are hard to machine with traditional machining processes. Being one of these materials, ceramics possess some unique properties like piezoelectricity and tribological properties which are not found in metal and polymers. EDM is capable of machining these ceramics, given these materials have an adequately high electrical conductivity. Preparing conducting ceramics is pre-requisite for incorporating ceramics in EDM. Different techniques such as compaction, tape casting, extrusion, injection molding and slip casting are used form green ceramic body. These green bodies are subsequently sintered to obtain ceramic parts. Adding conducting elements in the ceramics while processing results in conducting ceramics. These additions increase hardness but fracture toughness of body is compromised. Ceramic parts can also be machined by using assisting electrode and pyrolytic carbon technique. This paper discusses the various methods of shaping conducting ceramics and its machining characteristics for EDM application

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Abbas, Nasir, Muhammad Luqman, Abdul Rauf, Muhammad Shuaib, Haseeb Haroon, Syed Khalid Shah, and Muhammad Saleem. "Effect of Boron Oxide Addition on Microstructure and Mechanical Properties of Slip Cast Fused Silica." Materials Science Forum 1067 (August 10, 2022): 227–31. http://dx.doi.org/10.4028/p-9qvnzg.

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Boron Oxide (B2O3) was doped in fused silica using slip casting technique. Effects of addition of B2O3 on mechanical as well as dielectric properties along with microstructure were studied. It was observed that B2O3 acts as devitrification inhibitor by reducing the formation of cristobalite content during sintering of fused silica. Mechanical properties were improved by addition of B2O3. Density and flexural strength with (3% by weight) addition of B2O3 was 1.89 g/cc and 52MPa respectively.

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Abdullah, Noorsyakirah, Mohd Afian Omar, Shamsul Baharin Jamaludin, Nurazilah Mohd Zainon, Norazlan Roslani, Bakar Meh, Mohd Nizam Abd Jalil, Mohd Bakri Mohd Hijazi, and Ahmad Zahid Omar. "Innovative Metal Injection Molding (MIM) Method for Producing CoCrMo Alloy Metallic Prosthesis for Orthopedic Applications." Advanced Materials Research 879 (January 2014): 102–6. http://dx.doi.org/10.4028/www.scientific.net/amr.879.102.

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Powder injection molding (PIM) is a powder metallurgy process currently used for the production of complicated and near net shape parts of high performance materials [. This technique basically combines the advantages of plastic injection molding and the versatility of the conventional powder metallurgy technique. The process overcomes the shape limitation of powder compaction, the cost of machining, the productivity limits of isostatic pressing and slip casting, and the defect and tolerance limitations of conventional casting [1, 2, . According to German and Bose [, the technology of metal injection molding (MIM) is more complicated than that of the plastic injection molding, which arises from the need to remove the binder and to densify and strengthen the part. The process composed of four sequential steps: mixing of the powder and organic binder, injection molding, debinding where all binders are removed and sintering [1, 2, 3, 4]. If it necessary, secondary operations such as heat treatments after sintering can be performed [1, 2, 3, 4, .

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Zygmuntowicz, Justyna, Marcin Wachowski, Dominika Zielant, and Waldemar Kaszuwara. "Influence of Magnetic Field on the Distribution of the Ferromagnetic Component in Centrifugally Cast Ceramic-Metal Gradient Composites." Materials 14, no. 4 (February 18, 2021): 955. http://dx.doi.org/10.3390/ma14040955.

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The main aim of the investigation was to determine the impact of the content of nickel and the content of slurry on the nature of the microstructure and physical properties of the final products. In the study, six types of slurries were examined and prepared, differing in both the amounts of content of Ni metallic phase particles (5 vol.%, 10 vol.%, and 20 vol.%) and the amount of content of solid content in the prepared slurries (35 vol.%, and, 50 vol.%). The centrifugal slip casting (CSC) method in a magnetic field was used to fabricate the composites. This technique allowed the production of high-density ZrO2-Ni composites after sintering. Composites containing 50 vol.% of the solid content were characterized by a relative density equal to 99%. Applying the magnetic field allows controlling the distribution of the ferromagnetic phase (Ni) in the ceramic matrix (ZrO2). Based on the results obtained, it was found that the nature of the composites obtained is influenced by the rheological properties of the slurries, depending on their composition. The applicability of the CSC in the magnetic field technique for the production of the composite is characterized by a gradient in the distribution of components on the longitudinal section and has been proved. Based on the obtained results, a model for shaping the microstructure of composites with a longitudinal section was proposed. This work enabled a better understanding of creating microstructures in materials fabricated by centrifugal slip casting in a magnetic field.

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Matsunaga, Chika, Tetsuo Uchikoshi, Tohru S. Suzuki, Yoshio Sakka, and Motohide Matsuda. "Fabrication of c-Axis-Oriented Zeolite L Seed Layer on Porous Zirconia Substrate by Electrophoretic Deposition in Strong Magnetic Field." Key Engineering Materials 654 (July 2015): 274–79. http://dx.doi.org/10.4028/www.scientific.net/kem.654.274.

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Orientation technique based on the magneto-scientific crystal alignment phenomenon combined with electrophoretic deposition (EPD) technique was applied for the seeding process of zeolite L particles. Well-dispersed, ethanol-based zeolite L suspension was prepared and then consolidated on porous zirconia substrates by EPD. Conducting polypyrrole film synthesized on the zirconia substrate was used as an anodic substrate for the EPD process. The EPD was performed in a superconducting magnet with applying 12 T strong magnetic field to the suspension. The degree of orientation was characterized by XRD and compared with that of the zeolite L layer prepared by slip casting in a 12 T strong magnetic field using the same suspension.

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Nasir, Norazne, Nor Hayati Saad, Norrul Hafizan Ab Wahab, Bulan Abdullah, and Abdul Rahim Mahamad Sahab. "Product Performance Analysis of Fine Bone China Using Ceramic Slip Rotary Moulding Process." Applied Mechanics and Materials 899 (June 2020): 180–86. http://dx.doi.org/10.4028/www.scientific.net/amm.899.180.

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By combining the traditional slip casting technique and existing polymer rotary moulding concept a new process namely Ceramic Slip Rotary Moulding (CSRM) machine was established. The CSRM machine was developed to control parameters such as temperature (heating and cooling), time and speed. It is suitable for producing hollow ceramic products especially for ceramic materials such as fine bone china, which is a soft material used for tableware and art ware products due to its brightness and high strength. This research mainly focuses on the preparation of five different particle sizes of fine bone china measurements; 106 μm, 125 μm, 202 μm, 250 μm, and 300 μm respectively by using the CSRM machine. Different particle sizes of the fine bone china materials were tested to check the accurate and suitable wall thickness by controlling the temperature, speed, time and also the weight of the slip to get the best quality of fine bone china products. The parameters obtained will be the guidelines for the overall test to produce the best hollow fine bone china products.

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Kondo, Naoki, Hideki Hyuga, Katsumi Yoshida, and Hideki Kita. "Fabrication and Wettability Test of Silicon Nitrides with Ordered Protrusions." Solid State Phenomena 127 (September 2007): 173–78. http://dx.doi.org/10.4028/www.scientific.net/ssp.127.173.

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Silicon nitrides are often used as ladles, stalks, heater element protection tubes, etc., in the metal casting industry. A low wettability for molten metals is required for these purposes since wetting by molten metals leads to adhesion of solidified metals, which causes several problems. Surface structure is known to affect wettability. Thus, the present study attempts to fabricate silicon nitrides with controlled surface structures. Silicon nitrides, whose surfaces were covered with ordered hemispherical protrusions, were fabricated by the slip-casting technique. The cast bodies were sintered, and subjected to wettability tests using molten metals. For comparison, silicon nitrides with as-sintered and polished surfaces were also prepared. The surface with protrusions exhibited a lower contact angle compared to the as-sintered and polished surfaces. The contact angle depended on the diameter of the hemisphere; it was the largest at a diameter of 0.3 mm.

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29

Yan, Hong, and Zhi Min Huang. "Study on Creep Properties of SiCp/AZ61 Composites." Advanced Materials Research 189-193 (February 2011): 4227–30. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.4227.

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SiCp/AZ61 composites reinforced with SiC particles were fabricated by semi-solid stirring-melt casting technique. The creep properties of the composites have been studied by dynamic mechanical thermal analysis, micro-structural and XRD observation. The results show that the matrix grains were refined obviously at high temperature with SiC particles introducing and the creep properties of SiCp/AZ61 composites were improved comparing with AZ61 alloy. SiC particles were substituted for Mg17Al12 phase that was easily intenerated at high temperature on grain boundaries. The pinning of SiC particles prevents dislocation and slip of grain boundary at high temperature.

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Niu, Qun, Lin Chao Dai, Fu Dao Liu, and Yu Qiang Guo. "The Comprehensive Fire-Fighting Technology Research of the Section Retracement in Fully Mechanized Workface." Advanced Materials Research 709 (June 2013): 305–8. http://dx.doi.org/10.4028/www.scientific.net/amr.709.305.

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Spontaneous combustion of coal is one of the most serious coal mine disasters, which threat the workers' life safety. The paper introduce the comprehensive measures, such as monitor, positive draft technology, nitrogen injection, slip casting, fire preventing and extinguishing under seal, and other relevant coal spontaneous combustion forecast technique used in 1901s fully mechanized workface of FuCheng mining industry, when it has not been mined or its work face has not been removed, which realize the comprehensive treatment of coal spontaneous combustion, guarantee the safe production, and serves as a certain guidance and reference to the efficiency mining of spontaneous combustion coal seam.

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31

Azaman, Fazureen, Mohd Al Amin Muhamad Nor, Wan Rafizah Wan Abdullah, Mohd Hasmizam Razali, Noor Asliza Ismail Adnen, Rumaizah Che Zulkifli, and Asmadi Ali. "Fabrication of natural ball clay ceramic membrane using pore former and additive agents based on modified slip casting technique." DESALINATION AND WATER TREATMENT 223 (2021): 290–98. http://dx.doi.org/10.5004/dwt.2021.27151.

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32

Olhero, Susana M. H., and José Maria F. Ferreira. "Effect of the Consolidation Technique on the Sintering Ability and Thermal Properties of AlN Processed from Aqueous Suspensions." Materials Science Forum 514-516 (May 2006): 1531–35. http://dx.doi.org/10.4028/www.scientific.net/msf.514-516.1531.

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In this work, two different consolidation techniques were used to obtain AlN samples: slip casting and dry pressing of granules obtained from aqueous suspensions by freeze granulation. The green samples were sintered at a temperature (1750°C) lower than those usually used (>1800°C), using CaF2 and YF3 as sintering aids. The microstructural features were analysed by scanning electron microscopy (SEM) and the crystalline phases formed were identified by X-ray (XRD). Full dense AlN-based ceramics were obtained from both consolidation techniques; however the thermal conductivity values were quite different. The presence of carbon in the samples derived from the freeze granulated powder containing organic processing additives de-waxed in an inert atmosphere revealed to be helpful in the cleaning of oxygen present at the grain boundaries and consequently, for enhancing the thermal conductivity.

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33

Alias, Siti Salwa, Zawati Harun, and Salina Abu Mansor. "Characterization and performance of rice husk as additive in green ceramic water filter fabricated by slip-casting." World Journal of Engineering 17, no. 4 (June 13, 2020): 553–62. http://dx.doi.org/10.1108/wje-09-2019-0274.

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Purpose The purpose of this study is to investigate the using of rice husk (RH) which is a green material derived from agricultural waste with the ability to absorb heavy metal. It has been used in wastewater treatment. In this research, a kaolin-based green ceramic water filter (CWF) incorporated with two different additives (RH and zeolite-based RH ash [RHA]) was successfully fabricated. Design/methodology/approach The weight ratio of kaolin:additive was varied (90:10, 80:20 and 70:30) and fabricated via the slip-casting technique. The green CWFs were dried (60°C for 1 h), followed by sintering (1,200°C). Findings The green CWF of kaolin:RH with a weight ratio of 70:30 showed the best properties and satisfactory performance with a porous cross-section microstructure, highest porous area (4.58 µm2), good structure, lowest shrinkage (8.00%), highest porosity (45.10%), lowest density (1.79 g cm−3), highest water absorption (55.50%) and hardness (241.40 Hv). This green CWF has also achieved good permeability (42.00 L m−2h−1) and removal of the textile dye (27.88%). The satisfactory characterization and good textile dye removal performance (75.47%) were also achieved from green CWF with kaolin:zeolite at a weight ratio of 80:20. Research limitations/implications This research is focused on green CWF and zeolite at a certain amount with the specific characterization analysis methods. Practical implications The use of low-cost waste materials to treat dye wastewater from agricultural by-products/wastes sources in treating the dye will enhance the using of green material. Social implications Avoiding the waste sludge that can pollute the environment can create a health issue. The use of low-cost waste materials to treat dye wastewater from agricultural by-products/wastes sources in treating the dye can avoid the waste sludge that can pollute the environment and create serious health issue. Originality/value All the kaolin-based green CWFs incorporated with two different additives (RH and zeolite-based RHA) fabricated using a simple slip-casting technique have shown the potential to be used as a filter in wastewater treatment applications.

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34

Salman, Sabah, Sheahab Al-jubouri, and Haydar Al-obaidy. "Studying the Effects of Kaolinite Additions on the Properties of Ceramic Bodies Prepared from Alumina Powder by Slip Casting Technique." Journal of Garmian University 4, ICBS Conference (July 1, 2017): 269–83. http://dx.doi.org/10.24271/garmian.141.

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35

Xiao, Youcheng, Mengjiao Wang, Di Bao, Zhen Wang, Fangjun Jin, Yaowen Wang, and Tianmin He. "Performance of Fuel Electrode-Supported Tubular Protonic Ceramic Cells Prepared through Slip Casting and Dip-Coating Methods." Catalysts 13, no. 1 (January 12, 2023): 182. http://dx.doi.org/10.3390/catal13010182.

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Fuel electrode-supported tubular protonic ceramic cells (FETPCCs) based on the BaZr0.4Ce0.4Y0.15Zn0.05O3−δ (BZCYZ) membrane electrolyte was fabricated through a two-step method, in which the polyporous electrode-support tube was prepared with a traditional slip casting technique in a plaster mold, and the BZCYZ membrane was produced by a dip-coating process on the outside surface of the electrode-support tube. The dense thin-film electrolyte of BZCYZ with a thickness of ~25 μm was achieved by cofiring the fuel electrode support and electrolyte membrane at 1450 °C for 6 h. The electrochemical performances of the FETPCCs were tested under different solid oxide cell modes. In protonic ceramic fuel cell (PCFC) mode, the peak power densities of the cell reached 151–191 mW·cm−2 at 550–700 °C and exhibited relatively stable performance during continuous operation over 100 h at 650 °C. It was found that the major influence on the performance of tubular PCFC was the resistance and cathode current collectors. Additionally, in protonic ceramic electrolysis cell (PCEC) mode, the current densities of 418–654 mA·cm−2 were obtained at 600–700 °C with the applied voltage of 2.0 V when exposed to 20% CO2–80% H2 and 3% H2O/air. Using distribution of relaxation time analysis, the electrolytic rate-limiting step of the PCEC model was determined as the adsorption and dissociation of the gas on the electrode surface.

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36

Cavalli, Lorenzo. "Reaction Bonded Si₃N₄ (RBSN)/BN Composites for Industrial Applications." Advances in Science and Technology 89 (October 2014): 57–62. http://dx.doi.org/10.4028/www.scientific.net/ast.89.57.

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Hexagonal Boron Nitride (h-BN) shows remarkable physical properties, including high thermal stability, low density, low metals wettability, high corrosion resistance and microwave transparency. These features make it extremely interesting for several industrial applications such as furnaces manufacturing and metallurgy industry. Usually, h-BN parts are sintered by expensive high-temperature/high-pressure processes, strongly limiting their size. Here we present a new, cost-effective technique to obtain materials with high h-BN content and large dimensions, suitable for wide-scale industrial applications. Using h-BN and silicon powders as raw materials, reaction-bonded Si3N4/BN composites were obtained by complete nitriding of silicon. Two shaping techniques were exploited: slip casting and uniaxial compression molding using a thermosetting resin (in this case also Silicon Carbide was obtained), leading to materials with different properties. Both large (plates with diameter up to 400mm) and/or complexly-shaped objects (i.e. crucibles) were produced. Such materials were prepared using a Gas Pressure Sintering oven with different process parameters. The as-prepared samples were characterized and tested in a real application, as parts of liquid-silicon infiltration crucibles.

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37

Ramezanzade, S., GR Ebrahimi, M. Torabi Parizi, and HR Ezatpour. "Microstructure and mechanical characterizations of graphene nanoplatelets-reinforced Mg–Sr–Ca alloy as a novel composite in structural and biomedical applications." Journal of Composite Materials 54, no. 5 (August 6, 2019): 711–28. http://dx.doi.org/10.1177/0021998319867464.

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In this study, the novel composites were fabricated by the introduction of Mg-0.3Sr-0.3Ca alloy as the matrix and addition of different amounts of graphene nanoplatelets (0.1, 0.2, and 0.4 wt.%) as reinforcement using a stir casting technique followed by homogenization and extrusion in order to improve the mechanical properties of the base alloy. Optimum weight percent of adding graphene nanoplatelets was 0.2 wt.%. The addition of 0.2 wt.% graphene nanoplatelets in the extruded Mg–Sr–Ca alloy led to the grain refinement (∼36%), the decrease of anisotropy (∼14%) and the lowest twin formation. Moreover, the tensile and compressive yield strengths and tensile and compressive fracture strains of extruded Mg-0.3Sr-0.3Ca/0.2GNP composite were enhanced by 22.8%, 66.7%, 43.1% and 28%, respectively. The load transfer was significant strengthening mechanism. The uniform dispersion of graphene nanoplatelets followed by the increase of non-basal slip and grain refinement improved tensile fracture strain. In addition to maintained factors, the increase of compressive fracture strain in the extruded Mg-0.3Sr-0.3Ca/0.2GNP composite was affected by local stresses caused by twins which resulted non-basal slip and conserved basal slip due to presence of twins. Simultaneously, enhancement of the strengthening and elongation efficiencies in both tensile and compressive tests was achieved in Mg-0.3Ca-0.3Sr/0.2GNP. The biocorrosion behavior of extruded Mg-0.3Sr-0.3Ca/0.2GNP composite was promoted by 11% compared with Mg-0.3Sr-0.3Ca alloy. Comparative plots indicated that the fabricated materials can be introduced as a new class of composites for the purpose of structural as well as biomedical applications.

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38

Boudaira, B., A. Harabi, F. Bouzerara, S. Condom, F. Zenikheri, A. Guechi, L. Foughali, and N. Karboua. "Preparation and characterization of ZnO microfiltration membrane and its support using kaolin (DD3) and CaCO3." Cerâmica 62, no. 362 (June 2016): 186–90. http://dx.doi.org/10.1590/0366-69132016623621972.

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Abstract The objective of the present paper was to prepare a ceramic support with membrane. Tubular ceramic supports prepared from kaolin (DD3) and calcium carbonate with 6 and 10 mm inner and outer diameters, respectively, were extruded and sintered at 1200 °C. It has been found that sintered supports had interesting characteristics: average pore size of about 5µm, porosity of about 50%, and monomodal pore size distribution. This support was used to be substrate for a membrane layer of microfiltration. This membrane layer was elaborated from zinc oxide, using slip casting technique. The specimens were subsequently sintered at 1000 °C. The microstructure and porosity as well as the permeability have also been studied. It has been found that the average pore size was about 1.2µm, the layer thickness was ~33µm, and the water permeability measured was about 880 L.h-1.m-2.bar-1.

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39

Amat, Noor Faeizah, Andanastuti Muchtar, Norziha Yahaya, and Mariyam Jameelah Ghazali. "Effect of Dispersant Agent Amount in Colloidal Processing of Zirconia Dental Ceramic." Advanced Materials Research 622-623 (December 2012): 215–19. http://dx.doi.org/10.4028/www.scientific.net/amr.622-623.215.

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The effects of a polyelectrolyte dispersant agent, polyethyleneimine (PEI), on the rheology of zirconia 3Y-TZP suspensions and the densification characteristics of sintered zirconia were investigated. The colloidal processing technique was used to minimize the agglomeration of nanoparticles during the fabrication of the samples. Five batches of 10% zirconia suspensions containing different amounts of PEI at 0.3, 0.4, 0.5, 0.6, and 0.7 wt% were prepared. The rheological properties of the zirconia suspensions were determined using a rotational viscometer. The optimum amount of PEI that can maximize powders dispersion was determined. The green samples were then prepared using the slip casting process. The samples were densely sintered at a final sintering temperature of 1300 °C. The result revealed that the zirconia suspension with 0.5 wt% PEI was the most optimum amount to obtain a well-dispersed suspension. The sintered density of zirconia 3Y-TZP reached its maximum by adding 0.5 wt% PEI.

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Aissat, M., S. Hamouda, N. Bettahar, B. J. Abu Tarboush, and A. Bahmani. "Characterization and application of ceramic membranes prepared from Algerian kaolin." Cerâmica 65, no. 376 (December 2019): 554–61. http://dx.doi.org/10.1590/0366-69132019653762671.

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Abstract In this study, a new ceramic membrane type was used for the filtration of colored water. The membrane was prepared from local Algerian kaolin KT2 of Milia-type. The choice of this raw material was dictated by its natural abundance, to form the macroporous support prepared by the slip casting technique. A functional thin film layer (with a pore size of about 0.2 μm) produced by the sol-gel method was deposited on the support to reduce the porosity. A detailed study was conducted because of the importance of this layer and the improvement which brought to the filtration process. Ceramic membranes were tested for the removal of bromophenol red (BR) under a filtration pressure of 3 bar and a duration of 2 h of treatment. The results revealed a rejection rate of 100% for BR, especially after the addition of the inorganic layer. The material was characterized by DTA, TGA, XRD and SEM. The retention and the permeability of BR were also studied.

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41

Yang, Jian Feng, Ji Qiang Gao, Guo Jun Zhang, Ichiro Hayashi, and Tatsuki Ohji. "Effects of Pore Morphology on the Fabrication and Mechanical Properties of Porous Si₃N₄ Ceramics." Key Engineering Materials 280-283 (February 2007): 1231–36. http://dx.doi.org/10.4028/www.scientific.net/kem.280-283.1231.

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Porous Si3N4 ceramics with different pore morphology have been fabricated, utilizing either organic whiskers or starch as the fugitive agents, through slip-casting and die-pressing technique, respectively. The obtained porous ceramics have rod shaped or equiaxial pore morphology, originated from there two kinds of pore forming agents. The mechanical properties were investigated. The strength decreased considerably when small amount of whiskers were added, however, further increase in the whisker content only cause a moderate decrease of the strength. Gas permeability were measured for the samples with high whisker content of 60 vol% (corresponding to porosity of about 45% in the sintered bodies), and was compared with the counterpart contained the same porosity in which pores were equiaxial. The flexural strength of the samples with these two types of fugitive particles was almost the same, but the permeability of samples with rod-shaped pores were much higher than that with equiaxial pores, which can be understood in terms of a short pass model.

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42

Zhang, Bo, Xiang Zhao Zhang, Hui Wang, Gui Wu Liu, Hai Cheng Shao, and Guan Jun Qiao. "Preparation and Resistivity of Zirconia Oxygen Sensor Probe." Key Engineering Materials 697 (July 2016): 267–70. http://dx.doi.org/10.4028/www.scientific.net/kem.697.267.

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A ZrO2/Al2O3 (molar ratio of 1: 1, ZA) composite ceramic was formed by slip casting as solid electrolyte in a zirconia oxygen sensor. The bonding of the ZA ceramic green body to 95% Al2O3 ceramic green body support tube was carried out at 900 oC for 60 min by the gradient joining technique using pure Al2O3 slurry as the interlayer. Subsequently, the Pt slurry was coated on the surface of the pre-sintered composite ceramic, and then co-sintered at 1550 oC for 60 min to fabricate a Pt/ceramic composite probe. The interface microstructure and bonding mechanism were briefly investigated, and the electrical conductivity of the probe was tested. The experimental results show that the two high-quality ZA/Al2O3 and ZA/Pt interfaces were obtained. In particular, the relationship between the logarithm of conductivity (lnρ) and the reciprocal of temperature was well in accord with the Arrhenius equation. The Pt/ceramic composite probe presented the typical characteristic of high-temperature ionic conduction.

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Ochoa-Muñoz, Yasser H., Ruby Mejía de Mejía de Gutiérrez, Jorge E. Rodríguez-Páez, Isabel Gràcia, and Stella Vallejos. "Gas Sensors Based on Porous Ceramic Bodies of MSnO3 Perovskites (M = Ba, Ca, Zn): Formation and Sensing Properties towards Ethanol, Acetone, and Toluene Vapours." Molecules 27, no. 9 (April 30, 2022): 2889. http://dx.doi.org/10.3390/molecules27092889.

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In this work, the gas-sensing functionality of porous ceramic bodies formed by the slip casting technique was studied using perovskite nanoparticles of an MSnO3 system (M = Ba, Ca, Zn) synthesized by a chemical route. The performance and reliability of the sensitive materials in the presence of different volatile organic compounds (acetone, ethanol, and toluene), and other gases (CO, H2 and NO2) were analysed. The ZnSnO3, BaSnO3, and CaSnO3 sensors showed sensitivities of 40, 16, and 8% ppm−1 towards acetone, ethanol, and toluene vapours, respectively. Good repeatability and selectivity were also observed for these gaseous analytes, as well as excellent stability for a period of 120 days. The shortest response times were recorded for the ZnSnO3 sensors (e.g., 4 s for 80 ppm acetone) with marked responses to low concentrations of acetone (1000 ppb). These results are attributed to the porosity of the sensitive materials, which favours the diffusion of gases, induces surface defects, and provides greater surface area and good sensitivity to acetone, as is seen in the case of ZnSnO3.

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Sakka, Yoshio, and Tohru Suzuki. "New Processing of Textured Ceramics by Colloidal Processing Under High Magnetic Field." Key Engineering Materials 280-283 (February 2007): 721–28. http://dx.doi.org/10.4028/www.scientific.net/kem.280-283.721.

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The controlled development of texture is one of the ways for effective in improving the physical and mechanical properties. We’ll demonstrate new processing of textured ceramics as an example of alumina by slip casting in a high magnetic field and subsequent heating. Susceptibility of diamagnetic α-alumina is very small, but the orientation energy of alumina particle by a high magnetic field becomes larger than the thermal energy. α-alumina of a rhombohedral structure shows anisotropic susceptibility, but this anisotropy has up to now been more or less ignored due to its very low value. However, in a high magnetic field the energy of crystal anisotropy becomes comparable to or larger than the energy of thermal motion. The degree of orientation depends on processing factors such as heating temperature, particle size, magnetic field and concentration of suspension, etc. This process technique confers several advantages and it is possible for this type of processing to be applied to other non-cubic ceramics, such as TiO2, ZnO, SnO, HAP, AlN, SiC, etc.

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Adamaref, Solmaz, Weizhu An, Maria Ophelia Jarligo, Tetyana Kuznicki, and Steven M. Kuznicki. "Natural clinoptilolite composite membranes on tubular stainless steel supports for water softening." Water Science and Technology 70, no. 8 (September 13, 2014): 1412–18. http://dx.doi.org/10.2166/wst.2014.385.

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Disk membranes generated from high-purity natural clinoptilolite mineral rock have shown promising water desalination and de-oiling performance. In order to scale up production of these types of membranes for industrial wastewater treatment applications, a coating strategy was devised. A composite mixture of natural clinoptilolite from St. Cloud (Winston, NM, USA) and aluminum phosphate was deposited on the inner surface of porous stainless steel tubes by the slip casting technique. The commercial porous stainless steel tubes were pre-coated with a TiO2 layer of about 10 μm. Phase composition and morphology of the coating materials were investigated using X-ray diffraction and scanning electron microscopy. Water softening performance of the fabricated membranes was evaluated using Edmonton (Alberta, Canada) municipal tap water as feed source. Preliminary experimental results show a high water flux of 7.7 kg/(m2 h) and 75% reduction of hardness and conductivity in a once-through membrane process at 95 °C and feed pressure of 780 kPa. These results show that natural zeolite coated, stainless steel tubular membranes have high potential for large-scale purification of oil sands steam-assisted gravity drainage water at high temperature and pressure requirements.

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46

Ait Baih, M., H. Saffaj, A. Adam, A. Bakka, N. El Baraka, H. Zidouh, R. Mamouni, and N. Saffaj. "Application of the Experimental Design for the Optimization of Microfiltration Membrane." Journal of Applied Membrane Science & Technology 26, no. 1 (February 23, 2022): 95–106. http://dx.doi.org/10.11113/amst.v26n1.235.

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In the present study, the effect of zirconia powder content, polyvinyl alcohol (PVA), Contact time and sintering temperature of zirconia microfiltration membrane elaboration were evaluated using Plackett-Burman design (PBD) and investigated by thickness and pore diameter. The zirconia microfiltration membrane has been prepared by the powder suspension technique. A deflocculated suspension of zirconia was obtained by mixing (5-10% w/w) of zirconia, (30-35% w/w) of PVA (12% w/w aqueous solution) as binder and water. The zirconia layer was deposited on the inner surface of clay support by slip casting with a contact time (2-5 min). After drying at room temperature, the ZrO2 membrane was sintered (800-1000°C) for 2 hours. By using PBD, sintering temperature, PVA and zirconia were recognized and selected as important effectives parameters of pore diameter; On the other hand, PVA and contact time were the main controlling parameters of the thickness of zirconia microfiltration layer. The optimal factors to elaborate the microfiltration membrane by using experimental design include a sintering temperature of 1000°C, zirconia content of 5%, PVA content of 30% and contact time of 2 min predicting a pores diameter of 0,24 µm and thickness of 24 µm.

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Kibitkin, Vladimir, Nickolai Savchenko, Mikhail Grigoriev, Andrey Solodushkin, Alexander Burlachenko, Ales Buyakov, Anna Zykova, Valery Rubtsov, and Sergei Tarasov. "Digital Image Correlation Characterization of Deformation Behavior and Cracking of Porous Segmented Alumina under Uniaxial Compression." Ceramics 6, no. 1 (January 9, 2023): 102–31. http://dx.doi.org/10.3390/ceramics6010008.

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In this study, the two-dimensional digital image correlation (DIC) technique has been applied to sequences of images taken from the surfaces of porous, segmented alumina samples during uniaxial compression tests. The sintered alumina was structurally composed of polycrystalline alumina grains with interior ~3–5-μm pores, a network of discontinuities that subdivided the sample into ~230 μm segments, and ~110 μm pores located at the discontinuity network nodes. Bimodal pore structure and the segment boundaries were the results of the evaporation and the outgassing of the paraffin and ultra-high-molecular-weight polyethylene admixed with alumina powder via slip casting. Only partial bonding bridges between the segments were formed during a low-temperature sintering at 1300 °C for 1 h. A special technological approach made it possible to change the strength of the partial bonding bridges between the segments, which significantly affected the deformation behavior ceramics during compression. The subpixel accuracy of the DIC results was achieved using an interpolation scheme for the identification functional. The vector fields obtained in the experiment made it possible to characterize the processes of deformation and destruction of a porous, segmented alumina using the strain localization in situ maps, cardinal plastic shear, and circulation of vector fields. The use of these characteristics made it possible to reveal new details in the mechanisms of deformation and destruction of segmented ceramics. The localizations of damage were identified and related to the characteristic structural heterogeneities of the tested porous segmented ceramics.

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Supriadi, Sugeng, Nandy Putra, Bambang Ariantara, Sunaryo, and Dadit D. Rahmanto. "Fabrication of Lotus-Type Porous Copper Using Slip Casting and Sintering Techniques for Heat Pipe Applications." Applied Mechanics and Materials 819 (January 2016): 601–5. http://dx.doi.org/10.4028/www.scientific.net/amm.819.601.

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A lotus type-porous copper will be used to substitute wick materials from tabulate coral capillary for heat pipe applications. The lotus type-porous material are normally fabricated using Gasar process, in which unidirectional solidification was applied to the metal-eutectic systems to obtain long cylindrical pores in the direction of solidification. A new process is proposed to fabricate the lotus type-porous material using slip casting and sintering. As an initial work, this paper is aimed to obtain appropriate processing parameters of fabrication of lotus-type porous copper using slip casting and sintering techniques. Nylon strings were used as pore formers to form cylindrical pores. They were coated with copper slurry consisting of copper powder and binding agent. The coated nylon strings were arranged in a mold and the slurry were poured. After drying, these castings were sintered at various sintering temperatures and sintering times. The results showed that starch as the binding agent is superior to PVA. The mixture of starch-water with starch content of 97%, the copper slurry with copper content of 50% by volume, the copper powder size of 200 µm, the sintering temperatur of 900°C, and the sintering time of 60 minutes are able to produce lotus-type porous copper similar to that produced through Gasar process.

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Gomes, Fernando, Joaquim Barbosa, and Carlos Silva Ribeiro. "Evaluation of Functionally Graded Ceramic Crucible for Induction Melting of Titanium Based Alloys." Materials Science Forum 730-732 (November 2012): 769–74. http://dx.doi.org/10.4028/www.scientific.net/msf.730-732.769.

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During the last years a very significant effort to develop a melting crucible for induction melting of Ti based alloys at competitive cost has been carried out by many researchers, where the authors are included. Results obtained so far have shown that no material accomplishes the melting crucibles two main demands: inertness facing titanium alloys and suitable/enough thermal-shock resistance. Until now, yttrium and calcium oxides were those materials that performed best on what concerns to thermodynamic stability. However, in both cases, crucibles thermal-shock resistance was very poor, and there are references to crucibles that cracked during melting. Besides, calcium oxide reveals manipulation problems, due to its high higroscopicity. This paper concerns to the evaluation of zircon based crucibles with Y2O3 inner layer for induction melting of TiAl based alloys. A novel multi layered crucible production technique based in a centrifugally assisted slip casting process followed by a sintering operation is described, and results concerning to crucibles porosity and wall composition and morphology are presented. Crucibles obtained in different processing conditions were used to melt a Ti48Al alloy which was poured in graphite moulds. Experimental results include alloy chemical contamination with residual elements, mainly yttrium and oxygen, microhardness measurement and the presence of yttrium oxide and zircon inclusions in the cast samples. Results concerning to the crucibles behaviour are also presented with particular attention to cracks development. The Y2O3 crucible layer was found to suffer some erosion and be slightly dissolved by the molten alloy and the extent of those phenomena depends on the porosity of the layer surface, for fixed experimental melting conditions.

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Siddique, Imran, Yasir Khan, Muhammad Nadeem, Jan Awrejcewicz, and Muhammad Bilal. "Significance of heat transfer for second-grade fuzzy hybrid nanofluid flow over a stretching/shrinking Riga wedge." AIMS Mathematics 8, no. 1 (2023): 295–316. http://dx.doi.org/10.3934/math.2023014.

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<abstract> <p>This investigation presents the fuzzy nanoparticle volume fraction on heat transfer of second-grade hybrid $ {\text{A}}{{\text{l}}_{\text{2}}}{{\text{O}}_{\text{3}}}{\text{ + Cu/EO}} $ nanofluid over a stretching/shrinking Riga wedge under the contribution of heat source, stagnation point, and nonlinear thermal radiation. Also, this inquiry includes flow simulations using modified Hartmann number, boundary wall slip and heat convective boundary condition. Engine oil is used as the host fluid and two distinct nanomaterials ($ {\text{Cu}} $ and $ {\text{A}}{{\text{l}}_{\text{2}}}{{\text{O}}_{\text{3}}} $) are used as nanoparticles. The associated nonlinear governing PDEs are intended to be reduced into ODEs using suitable transformations. After that 'bvp4c, ' a MATLAB technique is used to compute the solution of said problem. For validation, the current findings are consistent with those previously published. The temperature of the hybrid nanofluid rises significantly more quickly than the temperature of the second-grade fluid, for larger values of the wedge angle parameter, the volume percentage of nanomaterials. For improvements to the wedge angle and Hartmann parameter, the skin friction factor improves. Also, for the comparison of nanofluids and hybrid nanofluids through membership function (MF), the nanoparticle volume fraction is taken as a triangular fuzzy number (TFN) in this work. Membership function and $ \sigma {\text{ - cut}} $ are controlled TFN which ranges from 0 to 1. According to the fuzzy analysis, the hybrid nanofluid gives a more heat transfer rate as compared to nanofluids. Heat transfer and boundary layer flow at wedges have recently received a lot of attention due to several metallurgical and engineering physical applications such as continuous casting, metal extrusion, wire drawing, plastic, hot rolling, crystal growing, fibreglass and paper manufacturing.</p> </abstract>

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Journal articles on the topic 'Slip casting Technique'

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