Journal articles: 'Alloy blend'

1

Jiang, Shui Qing. "Preparation of PMMA/PP/ PP-g-MAH Alloy." Advanced Materials Research 1061-1062 (December 2014): 30–34. http://dx.doi.org/10.4028/www.scientific.net/amr.1061-1062.30.

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Studies of the polypropylene grafted with malefic anhydride PP-g-MAH as compatibilizer to toughening polypropylene PP and PMMA blends. When PP/PMMA fixed ratio of 80/20, the effects of PP-g-MAH content on the blend morphology, mechanical properties and thermal properties. With the increase of PP-g-MAH content, strength and impact strength, tensile strength, PMMA/PP/PP-g-MAH blends were first increased and then decreased, and in the PP-g-MAH for 5 copies and reached the maximum value; while the flexural strength increased. The impact strength of the alloy compared with the alloy without the addition of compatibilizer increased about 30%, the tensile strength, bending strength increase obviously. That PP-g-MAH has effects on the morphology and properties of PMMA/PP/ PP-g-MAH blend system.

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Green, Peter F., and Edward J. Kramer. "Diffusion in Polymer Alloy Melts." MRS Bulletin 12, no. 8 (December 1987): 42–47. http://dx.doi.org/10.1557/s0883769400066744.

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AbstractDiffusion in polymer alloys or blends can be used to extract information on the fundamentals of the dynamics of individual polymer chains in the melt and the thermodynamics of the interaction between unlike polymer species. The dynamics of individual chains are available from measurements of the tracer diffusion coefficients, D*, of the various species while the thermodynamics of interaction, represented by the Flory parameter, x, can be obtained from measurements of the mutual diffusion or interdiffusion coefficient, D. We will show that these quantities can be measured conveniently by forward recoil spectrometry (FRES), an ion beam analysis technique that can determine the concentration versus depth profile of polymers labeled with deuterium diffusing into unlabeled polymer matrices.For high enough molecular weight of the matrix, the tracer diffusion coefficient of both species in the blend scale as D0N−2, where N is the number of monomer segments per diffusing chain; the constant D0, however, can differ by more than 104 for chemically different molecules diffusing in the same blend, suggesting that conventional concepts of chain dynamics in melts, such as monomer friction coefficients, need to be reexamined. The mutual diffusion coefficient is controlled by the faster species in the blend (the one with the larger D*N product) in agreement with what was found in metallic alloys (but in sharp disagreement with the “slow” theory of mutual diffusion which predicts that the slower species controls). Since the combinatorial (ideal) entropy of mixing of polymers is low, the thermodynamic driving force for diffusion is dominated by enthalpy and excess entropy of mixing (x) to a degree unprecedented for atomic or small molecule systems. This means that one can observe not only a thermodynamic “slowing down” of diffusion when x becomes positive as one nears the spinodal but also a large thermodynamic “speeding up” of diffusion when x is negative. Measurements of mutual diffusion turn out to be one of the most sensitive methods available for measuring x.

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Strauch, Anna Luise, Volker Uhlenwinkel, Matthias Steinbacher, Felix Großwendt, Arne Röttger, Abootorab Baqerzadeh Chehreh, Frank Walther, and Rainer Fechte-Heinen. "Comparison of the Processability and Influence on the Microstructure of Different Starting Powder Blends for Laser Powder Bed Fusion of a Fe3.5Si1.5C Alloy." Metals 11, no. 7 (July 12, 2021): 1107. http://dx.doi.org/10.3390/met11071107.

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This paper examines different blends of starting materials for alloy development in the laser powder bed fusion (LPBF) process. By using blends of individual elemental, ferroalloy and carbide powders instead of a pre-alloyed gas-atomized starting powder, elaborate gas-atomization processes for the production of individual starting powders with varying alloy compositions can be omitted. In this work the model alloy Fe3.5Si1.5C is produced by LPBF from different blends of pure elemental, binary and ternary powders. Three powder blends were processed. The base material for all powder blends is a commercial gas-atomized Fe powder. In the first blend this Fe powder is admixed with SiC, in the second with the ternary raw alloy FeSiC and in the third with FeSi and FeC. After characterizing the powder properties and performing LPBF parameter studies for each powder blend, the microstructures and the mechanical properties of the LPBF-manufactured samples were analyzed. Therefore, investigations were carried out by scanning electron microscopy, wave length dispersive x-ray spectroscopy and micro hardness testing. It was shown that the admixed SiC dissolves completely during LPBF. But the obtained microstructure consisting of bainite, martensite, ferrite and retained austenite is inhomogeneous. The use of the lower melting ferroalloys FeSi and FeC as well as the ternary ferroalloy FeSiC leads to an increased chemical homogeneity after LPBF-processing. However, the particle size of the used components plays a decisive role for the dissolution behavior in LPBF.

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M. Maruthi Rao and NVVS Sudheer. "Experimental investigation of heat treated alloy for hardness using multiple linear regression model." Open Journal of Science and Technology 5, no. 1 (October 10, 2022): 1–6. http://dx.doi.org/10.31580/ojst.v4i4.1683.

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Quenching media, temperature and time plays vital role to improve the mechanical properties of metal and alloys. Tap water blend with cow urine different compositions hot metal at different temperature interval and quenched the blend and find the hardness values Al 2585 alloy. Cow urine contains different ingredients to enhance the mechanical properties of the meal and alloy. Ingredients like sodium and silicon some other elements present homogeneously improve properties like tensile strength, yield strength and hardness. Sodium refine the micro structure and silicon interlocking the grain boundaries of the metal. The model defined the relationship existing between the two variables of % of blend and temperature of specimen and hardness value, the dependent variables. This was correlated with existing theories are the relationship between Hardness and two variables. A analytical model was developed for the fore casting of hardness, it was proved and certified to be a positive valuation tool for estimating the hardness on the heat treatment process.

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SAKANO, Hajime, Hiromichi AOKI, Hideki YAMAGUCHI, and Yasunobu TAKAGAWA. "Alloy Blend Composites. Weld Strength and Phase Structure of ABS/PBT Alloy." Seikei-Kakou 9, no. 6 (1997): 404–8. http://dx.doi.org/10.4325/seikeikakou.9.404.

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SAKANO, Hajime, Takayoshi FUJIWARA, Kiyoshi OGURA, and Masato YANO. "Alloy Blend Composites. Weld Strength and Phase Structure of ABS/PA6 Alloy." Seikei-Kakou 9, no. 6 (1997): 409–13. http://dx.doi.org/10.4325/seikeikakou.9.409.

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7

Ramosena, Lekhetho Ambition, Thywill Cephas Dzogbewu, and Willie du Preez. "Direct Metal Laser Sintering of the Ti6Al4V Alloy from a Powder Blend." Materials 15, no. 22 (November 18, 2022): 8193. http://dx.doi.org/10.3390/ma15228193.

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Additively manufactured Ti6Al4V parts have only seen major application in industries such as the aerospace and medical industries, mainly due to the high cost of production of the feedstock powder. In this article, the feasibility of in situ alloying a powder blend of elemental Ti and an Al–V master alloy to produce the Ti6Al4V alloy through direct metal laser sintering is presented and discussed. In a previous study, single track formation from this powder blend was studied and analyzed to determine the optimum principal process parameters suitable for this powder blend. These process parameters were employed in this study to produce single and double layers where the effects of varied hatch distance and the employment of a rescanning strategy on the surface morphology and alloy homogeneity were investigated. Lastly, in the current study, three-dimensional specimens were produced and analyzed to determine the alloy microstructure, homogeneity, part porosity and mechanical properties. The analyses revealed that a Ti6Al4V alloy with a density of up to 99.9% and corresponding tensile strength and ductility values of up to 942.9 MPa and 17% was produced. Furthermore, a minimum Al evaporation value of 7.2% was recorded. Therefore, in situ alloying can indeed be employed to produce high-quality Ti6Al4V parts from an elemental Ti and an Al–V master alloy powder blend.

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Gopi, Jineesh Ayippadath, and Golok Bihari Nando. "REACTIVE COMPATIBILIZATION OF THE BLENDS OF THERMOPLASTIC POLYURETHANE AND POLYDIMETHYLSILOXANE RUBBER." Rubber Chemistry and Technology 88, no. 4 (December 1, 2015): 584–603. http://dx.doi.org/10.5254/rct.15.84885.

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ABSTRACT The effect of ethylene-co-methacrylate (EMA) as polymeric chemical compatibilizer on the mechanical, dynamic mechanical, phase morphology, adhesion, and rheological properties of the blends of thermoplastic polyurethane (TPU)–polydimethylsiloxane rubber (PDMS) was investigated at different blend ratios. Melt blending technique was used to prepare the compatibilized blends. Enhancement of the mechanical properties and the reduction of dispersed PDMS domain size in the alloy confirmed the compatibilization effect of EMA on TPU-PDMS blends. Dynamic mechanical properties such as storage modulus, loss modulus, and the damping factor were evaluated to assess the compatibilization effect of EMA on TPU-PDMS blends. Creep tests revealed that compatibilization led to better dimensional stability. Compatibilized blends with finer PDMS rubber domains showed relatively less reduction in storage modulus as compared with uncompatibilized blends during stress relaxation studies. Rheological analysis suggested that the incorporation of EMA decreased the interfacial slip between the blend constituents, and this also confirmed the compatibilization effect of EMA on TPU-PDMS rubber blends as a polymeric reactive compatibilizer.

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9

HORIUCHI, Toru, Hideki YAMANE, Masaoki TAKAHASHI, and Tatsuki MATSUO. "Alloy Blend Composites. Effects of Wear Morphology on Tribological Properties of Polyamide 6/Polyolefin Blends." Seikei-Kakou 9, no. 6 (1997): 425–33. http://dx.doi.org/10.4325/seikeikakou.9.425.

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10

Luo, Yi Fei, Yue Huang Xie, Jia Miao Liang, and De Liang Zhang. "Preparation, Microstructure and Properties of Ti-6Al-4V Rods by Powder Compact Extrusion of TiH₂/Al₆₀V₄₀ Powder Mixture." Key Engineering Materials 770 (May 2018): 116–25. http://dx.doi.org/10.4028/www.scientific.net/kem.770.116.

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Ti-6Al-4V (wt.%) alloy rods were prepared successfully using a low-cost and short powder metallurgy process that involves mixing TiH2 and Al60V40 powders, compacting the powder blend and extruding the powder compact at elevated temperatures. The microstructure and mechanical properties of Ti-6Al-4V alloy and the effects of particle size, oxygen content and heat treatment on them were investigated. The results showed that the microstructure and homogeneity of the extruded rods were strongly affected by the particle size of TiH2/Al60V40 powder blends. By changing tumbler mixing into low-energy ball milling, the TiH2/Al60V40 particle sizes decreased, and the volume fraction of undissolved V rich particles in the microstructure of the extruded rod substantially decreased from 8.6% to zero. High yield strength and ultimate tensile strength of 1154 and 1353 MPa respectively with a moderate elongation to fracture of 3.6% are achieved with the Ti-6Al-4V rod prepared by using the powder blend. The extruded Ti-6Al-4V rod prepared using the ball milled powder had a very high strength, but limited ductility due to a high oxygen content. Solution treatment and aging slightly increase the strength of Ti-6Al-4V rods at the cost of dramatic decrease of ductility.

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11

Li, Minglang, Hui Lin, Benteng Ma, Xin Yu, Xiaoyang Du, Gang Yang, Caijun Zheng, and Silu Tao. "Non-fullerene acceptor alloy strategy enabling stable ternary polymer solar cells with efficiency of 17.74%." Journal of Materials Chemistry C 10, no. 8 (2022): 3207–16. http://dx.doi.org/10.1039/d1tc05228d.

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12

Jawed, Syed Faraz, Chirag Dhirajlal Rabadia, Fahad Azim, and Saad Jawaid Khan. "Effect of Nb on β → α ″ Martensitic Phase Transformation and Characterization of New Biomedical Ti-xNb-3Fe-9Zr Alloys." Scanning 2021 (December 6, 2021): 1–6. http://dx.doi.org/10.1155/2021/8173425.

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A new generation of Ti-xNb-3Fe-9Zr ( x = 15 , 20, 25, 30, 35 wt %) alloys have been designed using various theoretical approaches including DV-xα cluster, molybdenum equivalency, and electron to atom ratio. Afterward, designed alloys are fabricated using cold crucible levitation melting technique. The microstructure and mechanical performances of newly designed alloys are characterized in this work using scanning electron microscope and universal testing machine, respectively. Each alloy demonstrates monolithic β phase except Ti-35Nb-3Fe-9Zr alloy which display dual α ″ + β phases. Typically, niobium acts as an isomorphous beta stabilizer. However, in this work, formation of martensitic α ″ phases occurs at 35 wt % of niobium among the series of newly designed alloys. Furthermore, none of the alloys fail till the maximum load capacity of machine, i.e., 100 KN except Ti-35Nb-3Fe-9Zr alloy. Moreover, the Vickers hardness test is carried out on Ti-xNb-3Fe-9Zr alloys which demonstrate slip bands around the indentation for each alloy. Notably, the deformation bands and cracks around the indentations of each alloy have been observed using optical microscopy; Ti-35Nb-3Fe-9Zr demonstrates some cracks along with slip bands around its indentation. The Ti-25Nb-3Fe-9Zr alloy shows the highest yield strength of 1043 ± 20 MPa , large plasticity of 32 ± 0.5 % , and adequate hardness of 152 ± 3.90 Hv among the investigated alloys. The Ti-25Nb-3Fe-9Zr alloy demonstrates good blend of strength and malleability. Therefore, Ti-25Nb-3Fe-9Zr can be used effectively for the biomedical applications.

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13

Li, Hai Ling, Lai Xiang Zhang, and Xiao Ling Ding. "Effect of PP-g-MAH on Properties of ABS/PP Blends." Applied Mechanics and Materials 727-728 (January 2015): 313–17. http://dx.doi.org/10.4028/www.scientific.net/amm.727-728.313.

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Research of ABS and PP were mixed design, preparation and formulation of gold for the production process, performance test. Discussed in PP - g - MAH as computerize of cases, in the process of ABS blended with PP, ABS/PP blend formulas and the determination of process parameters is analyzed. Through performance test and analysis different composition ratio of computerize on the ABS/PP alloy performance impact. Finally concluded that, in the ABS/PP/PP blend - g - MAH, when PP-g-MAH is 4, 16 for PP, the impact of the blend with good performance, thermal deformation temperature is increased.

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14

Adeosun, S. O., E. I. Akpan, and S. A. Balogun. "Wrought Aluminium Alloy Corrosion Propensity in Domestic Food Cooking Environment." ISRN Corrosion 2012 (October 17, 2012): 1–6. http://dx.doi.org/10.5402/2012/432342.

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The study on corrosion behaviour of wrought aluminium alloy in domestic food cooking conditions has been examined using the gravimetric approach. Flat cold rolled and annealed sheets were subjected to solutions of Capsicum annuum, L. esculentum, Allium cepa, and their blend under three conditions, namely, heating and cooling in still air, heating and cooling in refrigerator, and leaving some in open still atmosphere. Results show that corrosion occurred within the test period (288 hours) in the test environments. There was severe degradation within the first 70 hours of test when coupons were heated and cooled while unheated coupon showed low corrosion propensity. Microstructural analysis show the presence of corrosion pits on coupon surface with second phase particles sandwiched in α-aluminium matrix. Immersed coupon in the blend media show higher number of pits on the surface. Rapid corrosion of wrought aluminium alloy in Capsicum annuum, L. esculentum and Allium cepa media is attributed to the presence of corrosion aggressive elements such as allicin, diallyl-disulphide, and allyl-propyl disulphide present in the corrosion media.

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Li, Ming Sheng, Dan Zhang, Yi Ming Jiang, and Jin Li. "Corrosion of Amorphous Fe_73.5Si_13.5B₉Nb₃Cu₁ Alloys on the Synergistic Effect of Chloride and Hydroxyl Ions." Advanced Materials Research 284-286 (July 2011): 1550–53. http://dx.doi.org/10.4028/www.scientific.net/amr.284-286.1550.

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The soft-magnetic properties and service life of amorphous or nanocrystalline Fe73.5Si13.5B9Nb3Cu1 have been influenced by the corrosion of the alloy. In this study, the electrochemical corrosions of amorphous Fe73.5Si13.5B9Nb3Cu1 in the blend solutions of sodium chloride and sodium hydroxide were investigated by linear polarization (PLZ) and electrochemical impedance spectroscopy (EIS) technique. The presence of OH- in the blend solution gave rise to typical passivation of the alloy. A suitable concentration of OH- was required for the low corrosion rate. And the higher concentration of OH- led to a faster corrosion. Increase of concentration of Cl- aroused more obvious corrosion. These results were ascribed to the deteriorating effect of Cl- and high-concentration OH- on the passive film formed on the surface of amorphous Fe73.5Si13.5B9Nb3Cu1.

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Liu, Yuan, Wen Long Yao, and Xiang Qi Li. "High Speed Extrusion Rheological Behavior Analysis of Marine ABS/PC Alloy." Advanced Materials Research 1052 (October 2014): 14–17. http://dx.doi.org/10.4028/www.scientific.net/amr.1052.14.

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The ABS/PC alloy was prepared, and the extrusion characteristics of the alloy melt was studied by a constant speed Double-capillary rheometer. The micromorphology of the blend was characterized by SEM, and extrusion processing property was also analyzed. The results show that, the ABS/PC alloy with the optimum processability properties can be obtained when the ratio of ABS to PC is 90/10, and mechanical properties of the alloy can meet the requirement of ship's magnetic compass cover. Morover, the processability properties of the alloy are sharply declined with the higher PC ratio in ABS/PC.

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17

Xiao, Zhi Yu, Jun Wang, Tungwai Leo Ngai, Ming Shao, and Yuan Yuan Li. "Study on Warm Flow Compacted Tungsten-Based Alloy Powder for Cross-Shape Part." Materials Science Forum 561-565 (October 2007): 921–24. http://dx.doi.org/10.4028/www.scientific.net/msf.561-565.921.

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Warm flow compaction is a new, simple and economy process that can produce complex powder metallurgy parts. A special apparatus for measuring the lateral flow capability of the powder was designed and manufactured. It can be used to analyze the feasibility of forming complex cross-shaped parts. The preparation of the powder blend and effects of pressing speed, temperature and axial pressure on the lateral flow capability of a tungsten-base powder mix were investigated. Results showed that the lateral-pressure increased with increased pressing speed and increased applied axial-pressure. The lateral-pressure decreased as lateral-distance increased. Biggest lateral-pressure was obtained when the powder blend was pressed at around 96 °C, at which the binder start to melt. In this study cross-shaped powder metallurgy parts were successfully prepared by warm flow compaction.

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Chen, Hua, Jing Chao Zhang, and X. Y. Lu. "Oxidation Behavior of TiAl Based Alloys Prepared by Spark Plasma Sintering." Advanced Materials Research 152-153 (October 2010): 940–44. http://dx.doi.org/10.4028/www.scientific.net/amr.152-153.940.

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The spark plasma sintering (SPS) microstructure and high temperature oxidation behavior of TiH2-45Al-0.2Si-5Nb(at.%) alloy were investigated.Emphasis was placed on the effect of SPS microstructures, obtained by blend powder and mechanical alloying powder. The mass gain due to oxidation was measured using an electro balance. The oxide layers as well as its micro-structure were examined by SEM and EDS, and XRD. The results show that sintered microstructure of blend powder is composed of fully lamellar TiAl/ Ti3Al phase, and that of the mechanical alloying powder is composed of finer granular TiAl/Ti3Al phase. The latter oxidation rate is lower, and forms continuous mixed oxide layer of Al2O3 and TiO2. Both SPS microstructure of blend powder and mechanical alloying powder are superior in oxidation behavior to ordinary vacuum sintering.

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Jiang, Z., C. Lucien Falticeanu, and I. T. H. Chang. "Warm Compression of Al Alloy PM Blends." Materials Science Forum 534-536 (January 2007): 333–36. http://dx.doi.org/10.4028/www.scientific.net/msf.534-536.333.

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With the onging trend of reducing the weight of automotive parts, there is also an increasing trend in the use of light alloys. Recently, aluminum powder metallurgy has been the subject of great attention due to the combination of the lightweight characteristics of aluminium and the efficient material utilisation of the powder metallurgical process, which offer attractive benefits to potential end-users. Conventional press and sinter route of non-ferrous P/M products are based compaction at room temperature prior to the sintering cycle. However, warm compaction process has successfully provided increased density in ferrous powder metallurgy parts, which contributes to better mechanical properties and consequently overall performance of those parts. This study is aimed at exploring the use of warm compaction process to aluminium powder metallurgy. This paper presents a detailed study of the effect of warm compression and sintering conditions on the resultant microstructures and mechanical properties of Al-Cu-Mg-Si PM blend.

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Hoshiyama, Yasuhiro, Kentaro Hirano, and Hidekazu Miyake. "Production of Rapidly Solidified Composite Deposits Based on Iron with Vanadium Carbide Particles by Plasma Spraying." Materials Science Forum 638-642 (January 2010): 841–45. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.841.

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In the thermal spraying process, spray material is heated, melted, and accelerated by a high temperature flame. Thermal spraying can produce thick materials that rapidly solidify, because the alloy droplets accumulate successively on the substrate and solidify at a cooling rate in the range of 105-108Ks-1. Depending on the cooling conditions of the substrate and on the alloy composition, deposits are produced with metastable phases or extremely fine crystalline phases. Thermal spraying is an attractive method for the production of composite deposits with fine particles formed in-situ. In particular, iron based alloy with vanadium carbide, is useful in metal molds and also in pump parts due to its high wear resistance and high corrosion resistance. In the present work, low-pressure plasma spraying of Fe-C-V/Ni-Mg and Fe-C-V-Cr-Ni/Ni-Mg blend powders were iron based composite deposits with finely dispersed vanadium carbide particles. The as-sprayed deposit produced from Fe-C-V/Ni-Mg blend powder is composed of αFe and V8C7. The as-sprayed deposit produced from Fe-C-V-Cr-Ni/Ni-Mg blend powder is made up of γFe, αFe, V8C7 and Cr7C3. The fine precipitates of approximately 0.3μm in the as-sprayed deposit are carbide. With increasing the heat-treatment temperature up to 1273K, the carbide particles coarsen. The hardness of as-sprayed deposit produced from the Fe-C-V-Cr-Ni/Ni-Mg, which has many fine carbide precipitates, is the hardest of the deposits.

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Diaz de Zerio Mendaza, Amaia, Armantas Melianas, Ferry A. A. Nugroho, Olof Bäcke, Eva Olsson, Christoph Langhammer, Olle Inganäs, and Christian Müller. "A fullerene alloy based photovoltaic blend with a glass transition temperature above 200 °C." Journal of Materials Chemistry A 5, no. 8 (2017): 4156–62. http://dx.doi.org/10.1039/c6ta08106a.

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Solar cells based on a glass-forming ternary blend of C₆₀, C₇₀ and PTB7 display a high power conversion efficiency above 5% up to an annealing temperature of 180 °C. The excellent thermal stability correlates with a high glass transition temperature of 224 °C.

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Zhao, Hong Kai, Li Guang Xiao, and Jing Wu Gao. "Water Resistance Research of Anionic Polymerized PA6/ABS Alloy." Advanced Materials Research 634-638 (January 2013): 2106–9. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.2106.

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Macromolecule modification activator was prepared using prepolymer of HTBN end capped by HDI biuret (N-75). Then the ABS/PA6 co-blend polymer was prepared by anionic polymerization with putting ABS resin into molten caprolactam monomer at the temperature of 160-180 °C and the sodium hydroxide being used as activator. Compared with PA6， the copolymer alloy shows obviously low water absorption and slightly reducing mechanical property after absorption， while the loss of mechanical property is lower. The SEM analysis reveals that the reaction insitu compatibilization reduces the interfacial tension between PA6 and ABS and makes the ABS grain smaller and more uniform dispersion in PA6.

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Kongkarat, Somyote, Meekaruna Boonyaratchinda, and Chirakit Chobtham. "Formation of Ferrosilicon Alloy at 1550°C via Carbothermic Reduction of SiO₂ by Coal and Graphite: Implication for Rice Husk Ash Utilization." Solid State Phenomena 315 (March 2021): 16–24. http://dx.doi.org/10.4028/www.scientific.net/ssp.315.16.

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Ferrosilicon alloy has been commercially produced in an electric furnace at 1700 - 1750 °C, using quartz as a silica source. With an aim to reduce production cost, rice husk ash (RHA) had been introduced to the process as a silica source. The present study reports an in-depth investigation on the ferrosilicon alloy formation at 1550 °C via carbothermic reduction using RHA with coal and graphite. Blend A: RHA/Fe2O3/Coal and B: RHA/Fe2O3/Graphite were prepared according to the C/O molar ratio of 1/1. The well-mixed samples were compacted into a pellet and then heated at 1550 °C in the tube furnace for 30 and 60 minutes while the argon flowing at the rate of 1 L/min. XRD and SEM results show that the bulk metal mainly composes of FeSi phase, while SiC and other slag phases adhere at the surface of the droplet. Characteristics of the carbonaceous materials, especially ash oxides content affect the kinetic of ferrosilicon formation. Silicon concentration in the produced metal droplets was measured using an ICP technique. For blend A, Si content in the metal was 18.3 wt% and 81.9 wt% after 30 and 60 minutes, respectively. While, Si recovery in the metal for blend B reached 88.4 wt% since 30 minutes. The experimental results show that the production of ferrosilicon alloy from RHA can be produced at 1550 °C, which the temperature lower than that of the commercial method by 150-200 °C. The finding in this research is beneficial for ferrosilicon and agricultural industries and thus promotes the sustainable steelmaking industry.

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Li, Ming Sheng, Jin Wei Tu, and Shu Juan Zhang. "Effects of Annealing on Electrochemical Corrosion of Fe_73.5Si_13.5B₉Nb₃Cu₁ Alloys." Advanced Materials Research 345 (September 2011): 83–86. http://dx.doi.org/10.4028/www.scientific.net/amr.345.83.

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The electrochemical corrosion affects soft-magnetic properties and service life of amorphous or nanocrystalline Fe73.5Si13.5B9Nb3Cu1 alloys. Therefore it is important to characterize the corrosion characteristic of the alloys for their potential application to engineering fields and further alloy development. In this study, the corrosion behavior of nanocrystalline Fe73.5Si13.5B9Nb3Cu1 alloys prepared by crystallization from the amorphous state was studied and compared with that of their amorphous counterparts by linear polarization (PLZ) and electrochemical impedance spectroscopy (EIS) technique. In electrolyte of 0.01 M NaCl, annealing at 550 °C leads to the decreased corrosion rate, while crystallization at 650 °C gives rise to the increase of corrosion rate. In the blend solution of 0.1 M NaCl and 0.1 M NaOH, heat-treatment at 550 °C or 650 °C improves the corrosion resistance for the alloys.

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Gu, Wenxing, Lei Yang, Yusheng Chen, Xinlong Wang, Hao Zhang, Jianhui Hou, Zhengang Zhu, and Hui Huang. "Ternary blend polymer solar cells with two non-fullerene acceptors as acceptor alloy." Dyes and Pigments 141 (June 2017): 388–93. http://dx.doi.org/10.1016/j.dyepig.2017.02.043.

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Bolzoni, L., E. M. Ruiz-Navas, De Liang Zhang, and Elena Gordo. "Modification of Sintered Titanium Alloys by Hot Isostatic Pressing." Key Engineering Materials 520 (August 2012): 63–69. http://dx.doi.org/10.4028/www.scientific.net/kem.520.63.

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Powder metallurgy (PM) permits to obtain titanium alloys with properties and microstructures close to ingot metallurgy products. However, residual porosity is normally present in the products produced by the PM route of powder pressing and sintering (P&S)\, and this needs to be reduced by using post-sintering process step such as hot isostatic pressing (HIP) and forging. In this study, the microstructural and mechanical property changes caused by HIP of samples of two alloys, near-α Ti-3Al-2.5V alloy and α+β Ti-6Al-4V, produced by P&S route were investigated. Two types of powders were utilised: prealloyed powders and blend of elemental titanium powder and master alloy powder. Four conditions defined by HIP temperature, pressure and time were used to HIP the sintered samples with two geometries. The results show that, independent of the HIP conditions used, HIP increased the relative density of the samples to approximately 97.5% and their hardness by 30-50 HV depending on the HIP condition. However, HIP at 1000°C changes the fracture mode of the sintered samples from ductile to brittle.

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Chen, Yinan, and Bo Li. "Double-phase refractory medium entropy alloy NbMoTi via selective laser melting (SLM) additive manufacturing." Journal of Physics: Conference Series 2419, no. 1 (January 1, 2023): 012074. http://dx.doi.org/10.1088/1742-6596/2419/1/012074.

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Abstract Elemental metals Nb and Mo are common refractory metals, performing good properties in a high-temperature working environment. While due to their high melting points, they are hard to be manufactured. Besides, elemental metal with a single BCC phase performs onefold properties, which promotes the design of medium/high entropy refractory alloys. This paper focuses on the formability analysis of refractory metals Mo, Nb and mixed MoNbTi powder printed by SLM. It successfully demonstrated for the first time that laser metal deposition can be used to produce MoNbTi high-entropy alloy from a blend of elemental powders by in-situ alloying with the assistance of the Flow 3D app. The densities of elemental Nb, Mo and MoNbTi manufactured by the corresponding optimized printed parameters were 99.41%, 99. 13% and 97.38%, respectively. As-built MoNbTi high-entropy alloy contained FCC+BCC double phase. The FCC phase is diffusively precipitated in the BCC phase, and the boundary is moist.

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Zarinkolah, Zohreh, Hamed Bagheri, Saman Hosseinkhani, and Maryam Nikkhah. "INVESTIGATION ON THE MECHANICAL, THERMAL, BIO-DEGRADATION, AND BIO-COMPATIBILITY PROPERTIES OF POLY (LACTIC ACID) / POLY (ETHYLENE GLYCOL) BLEND." IIUM Engineering Journal 22, no. 1 (January 4, 2021): 223–33. http://dx.doi.org/10.31436/iiumej.v22i1.1478.

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Absorbable sutures are widely used in surgery. In addition to acceptable mechanical properties, the surgical sutures should exhibit favorable degradability properties. In this research, the mechanical and thermal properties, hydrophilicity, biodegradability, pH changes, and drug release profile of polylactic acid (PLA) and polyethylene glycol (PEG) alloy were examined to fabricate absorbable sutures. The test results for the mechanical properties showed that the strength of the PLA/PEG alloy decreased with increasing PEG content, leading to an increase in elongation. The differential thermal analysis indicated that the resulting material was above its glass transition temperature (Tg) at ambient temperature and was thus flexible enough. According to the degradation test results, the alloys were degraded similar to the commercial sample. Furthermore, the pH measurements revealed that the degradation of the alloy had no significant effect on the pH of the environment. Bupivacaine hydrochloride was incorporated into a certain amount of PLA and PEG, and the drug release rate was then measured. The sample provided a suitable substrate for burst release. Moreover, the cytotoxicity test was carried out to evaluate the biocompatibility properties of the PLA/PEG alloy and it was found that this alloy is biocompatible and the biocompatibility of the material decreases with increasing drug loading. ABSTRAK: Sutur boleh serap telah digunakan dalam pembedahan secara meluas. Tambahan kepada sifat-sifat mekanikal ini, sutur pembedahan perlu memiliki ciri-ciri kebolehurain yang dikehendaki. Dalam kajian ini, sifat-sifat mekanikal dan terma, kehidrofilikan, kebolehuraian, perubahan pH, dan profil penguraian ubat asid polilaktik (PLA) dan aloi polietilena glikol (PEG) telah dikaji bagi mencipta sutur boleh serap. Hasil kajian mendapati sifat-sifat mekanikal menunjukkan kekuatan PLA/PEG aloi berkurangan dengan penambahan level PEG, menyebabkan bertambahnya pemanjangan. Analisis pembezaan terma menunjukkan hasil bahan adalah melepasi suhu perubahan gelas (Tg) pada suhu sekitar dan oleh itu sangat lentur. Berdasarkan hasil kajian degradasi, aloi ini telah digradasi seperti sampel komersial. Tambahan lagi, ukuran pH menunjukkan degradasi aloi ini tidak menunjukkan kesan langsung pada pH persekitaran. Bupivacaine hidroklorida dimasukkan ke dalam PLA dan PEG, dan kadar ubat dibebaskan kemudiannya diukur. Sampel substrat yang bersesuian disediakan bagi pelepas letus. Tambahan, ujian Kesitotoksikan telah dijalankan bagi menilai ciri-ciri keserasian-bio aloi PLA/PEG dan didapati aloi ini serasi-bio dan keserasian-bio bahan berkurangan dengan penambahan beban ubat.

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EL-HASAN, MUSA. "ELECTRONIC STRUCTURE OF GaxIn1-xASyP1-y QUATERNARY ALLOY BY RECURSION METHOD." International Journal of Modern Physics B 13, no. 01 (January 10, 1999): 97–106. http://dx.doi.org/10.1142/s0217979299000084.

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The electronic structure of Ga x In 1-x As y P 1-y quaternary alloy, calculated by recursion method is reported. A five orbitals sp3s* per atom model was used in the tight-binding representation of the Hamiltonian. The local density of states and its orbital decomposition (LDOS), integrated density of states (IDOS) and structural energy (STE) were calculated for Ga, In, As and P sites in Ga 0.5 In 0.5 As 0.5 P 0.5, GaInAsP lattice matched to InP and lattice matched to GaAs as well. There are 216 atoms arranged in a zinc-blend structure. The calculated quantities are as expected for such systems.

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Angmo, Dechan, Morten Bjerring, Niels Chr Nielsen, Barry C. Thompson, and Frederik C. Krebs. "Fullerene alloy formation and the benefits for efficient printing of ternary blend organic solar cells." Journal of Materials Chemistry C 3, no. 21 (2015): 5541–48. http://dx.doi.org/10.1039/c5tc00781j.

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Bosman, Hendrik L., and Deborah C. Blaine. "Influence of Powder Particle Size Distribution on the Properties of Press-and-Sintered Titanium and Ti-6Al-4V Preforms." Advanced Materials Research 1019 (October 2014): 225–30. http://dx.doi.org/10.4028/www.scientific.net/amr.1019.225.

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The potential to control the final properties, as measured by density, strength and microstructure, of press-and-sintered titanium and master alloy Ti-6Al-4V is investigated by designing and evaluating bimodal particle size distributions of the relevant powders. Ratios of 1/3, 2/3 and 1/1 by volume of coarse to fine powders, as determined by particle size peaks, were blended from -200 and -100 mesh commercially pure titanium powders and -200 mesh 60Al-40V master alloy powder, in the case of Ti-6Al-4V. The powder blends were uniaxially compacted at 350, 400 and 450 MPa, and the green specimens were sintered under high vacuum for two hours at 1300°C. The results support theoretical prediction of green and sintered density based on the ratio of the volume percentage of coarse to fine powder; green density increases as the ratio of coarse powder increases for both the pure and alloy titanium, while the sinter density similarly decreases for the pure titanium. Microstructural observations of the sintered specimens show that the pore size decreases, and the pore shape becomes more rounded, as the ratio of fine powder increases. In order to extend the study to find the optimal packing ratio, and potentially the optimal blend for densification, further refinement of the initial powder particle size distributions is needed.

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Jia, Yuan, Juxiang Yang, Zhen Liu, Limei Song, and Ruifeng Shi. "Tribological properties of bismaleimide alloy blend with a novel silicon dioxide-containing benzoxazine-monomer." Plastics, Rubber and Composites 50, no. 4 (February 10, 2021): 200–207. http://dx.doi.org/10.1080/14658011.2021.1885186.

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Rudinsky, S., P. Hendrickx, D. P. Bishop, and M. Brochu. "Spark plasma sintering and age hardening of an Al–Zn–Mg alloy powder blend." Materials Science and Engineering: A 650 (January 2016): 129–38. http://dx.doi.org/10.1016/j.msea.2015.10.029.

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Pranesh Rao, K. M., and K. Narayan Prabhu. "Assessment of Wetting Kinematics and Cooling Performance of Select Vegetable Oils and Mineral-Vegetable Oil Blend Quench Media." Materials Science Forum 830-831 (September 2015): 160–63. http://dx.doi.org/10.4028/www.scientific.net/msf.830-831.160.

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Quench hardening is a process where an alloy is heated to solutionizing temperature and held for a definite period, and then rapidly cooled in a quenching medium. Selection of quenchant that can yield desired properties is essential as it governs heat extraction process during quenching. In the present work, the cooling performance of vegetable oil and mineral-vegetable oil blend quench media was assessed. The vegetable oils used in this work were olive oil, canola oil and rice bran oil. The mineral-vegetable oil blends were prepared by blending 10 and 20 vol. % of rice bran and canola oil in mineral oil. Inconel probe of 12.5mm diameter and 60mm height, instrumented with thermocouples were used to characterize quenchants. The probe was heated to 850°C and quenched in the oil medium. The cooling curves at different locations in the probe were used to study wetting kinematics. Inverse modelling technique was used to estimate spatially dependent metal-quenchant interfacial heat flux. It was found that the vegetable oils exhibited very short vapour blanket stage compared to mineral oil and blends. Faster wetting kinematics obtained with blends resulted in uniform heat transfer compared to that of mineral oil. The temperature distribution in the probe quenched in vegetable oils and blends was more uniform compared to that in mineral oil. It is expected that the parts quenched in vegetable oils and blends would lead to better hardness distribution compared to mineral oils.

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Zhao, Hong Kai, Li Guang Xiao, and Jing Wu Gao. "Mechanical Properties Research of Anionic Polymerized PA6/ABS Alloy." Advanced Materials Research 634-638 (January 2013): 1836–39. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.1836.

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Macromolecule modification activator was prepared using prepolymer of HTBN end capped by HDI biuret (N-75). Then the ABS/PA6 co-blend polymer was prepared by anionic polymerization with putting ABS resin into molten caprolactam monomer at the temperature of 160°C~180°C and the sodium hydroxide being used as activator. In the system of in-situ synthetic ABS modified nylon resin ,when the content of ABS is at 10% with rubber modifier as compatiblizing agent for ABS and nylon, the impact strength of matrices stepped up obviously, and the effect is better than that in the system of rubber modification. Along with added ABS, the tensile strength and bending strength fell that is lower than the tensile strength of pure nylon but apparently higher than that of the rubber modification system. The increase usage of compatiblizing agent improved the intensity and rupture elongation of matrices. It was indicated that ABS obstructed spherulitic growth and resulted in the reduction of nylon crystallinity.

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D’Elia, Marco F., Mirko Magni, Thomas Romanò, Stefano P. M. Trasatti, Markus Niederberger, and Walter R. Caseri. "Smart Anticorrosion Coatings Based on Poly(phenylene methylene): An Assessment of the Intrinsic Self-Healing Behavior of the Copolymer." Polymers 14, no. 17 (August 24, 2022): 3457. http://dx.doi.org/10.3390/polym14173457.

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Poly(phenylene methylene) (PPM) is a multifunctional polymer featuring hydrophobicity, high thermal stability, fluorescence and thermoplastic processability. Accordingly, smart corrosion resistant PPM-based coatings (blend and copolymer) were prepared and applied by hot pressing on aluminum alloy AA2024. The corrosion protection properties of the coatings and their dependence on coating thickness were evaluated for both strategies employed. The accelerated cyclic electrochemical technique (ACET), based on a combination of electrochemical impedance spectroscopy (EIS), cathodic polarizations and relaxation steps, was used as the main investigating technique. At the coating thickness of about 50 µm, both blend and copolymer PPM showed effective corrosion protection, as reflected by |Z|0.01Hz of about 108 Ω cm2 over all the ACET cycles. In contrast, when the coating thickness was reduced to 30 µm, PPM copolymer showed neatly better corrosion resistance than blended PPM, maintaining |Z|0.01Hz above 108 Ω cm2 with respect to values below 106 Ω cm2 of the latter. Furthermore, the analysis of many electrochemical key features, in combination with the optical investigation of the coating surface under 254 nm UV light, confirms the intrinsic self-healing ability of the coatings made by PPM copolymer, contrary to the reference specimen (i.e., blend PPM).

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NIKKESHI, Susumu, Kiyoshi SUZUKI, Masuo KUDO, and Toru MASUKO. "Alloy Blend Composites. The Effects of Surface-Treatment for Zeolite Powder in Zeolite/Polycarbonate Composites." Seikei-Kakou 9, no. 6 (1997): 414–19. http://dx.doi.org/10.4325/seikeikakou.9.414.

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NIKKESHI, Susumu, Eiji ITO, Masuo KUDO, and Toru MASUKO. "Alloy Blend Composites. The Effects of Surface-Treatment for Nickel Particle in Nickel/Polycarbonate Composites." Seikei-Kakou 9, no. 6 (1997): 420–24. http://dx.doi.org/10.4325/seikeikakou.9.420.

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MITSUISHI, Kazuta. "Alloy Blend Composites. Acoustic Microscopy Evaluation of Polypropylene/Ethylene Vinyl Acetate Filled with Calcium Carbonate." Seikei-Kakou 9, no. 6 (1997): 434–41. http://dx.doi.org/10.4325/seikeikakou.9.434.

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Wen, Zhang, Wang Li, Guo Zhao-xia, and Yu Jian. "BLENDING ABS RESIN AND ITS EFFECT ON STRUCTURE AND PROPERTIES OF PC/ABS BLEND ALLOY." Acta Polymerica Sinica 013, no. 10 (November 8, 2013): 1298–303. http://dx.doi.org/10.3724/sp.j.1105.2013.13062.

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Komaba, Kyoka, Reiji Kumai, and Hiromasa Goto. "(Digital Presentation) Synthesis of Conjugated Polymer Alloy Prepared By Electrochemical Polymerization in Chiral Liquid Crystal." ECS Meeting Abstracts MA2022-01, no. 15 (July 7, 2022): 2473. http://dx.doi.org/10.1149/ma2022-01152473mtgabs.

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In this research, we synthesized polymer alloy by electrochemical polymerization in chiral liquid crystal. Homopolymers and the copolymer can be synthesized when electrochemical polymerization was conducted in the presence of several types of monomers. The polymer alloy thus prepared contains both blend of homopolymers and copolymers. The polymer alloy shows optical activity. The chirality derived from transcription of liquid crystal during the polymerization reaction results to show optical activity. The polymer alloy can show optical activity with no asymmetric centers. The optical activity is due to existence of charge carriers (polarons) in the main chain as a form of conjugated polymers. This is called chiral charge carrier “chiralions”. This research found that the chiral polymer alloy has chiralions. Polymer alloys have been prepared by blending several kinds of polymers in the reaction. Polymer alloys also can be prepared by melt method. Unsubstituted conjugated polymers have poor solubility and fusibility because of the rigid π-bonds in the skeleton, which is drawback for preparation of π-conjugated polymer-based alloys. We have studied on preparation of chiral conjugated polymer alloys with combination of achiral polymers and chiral polymers. In the present study, conjugated polymer alloys were synthesized with the method described in Figure 1a. Cholesteryl acetate (chiral inducer), 2,7-di(2-thienyl)fluorene (mono1), N-methyl-3,6-di(2-thienyl)carbazole (mono2) and TBAP (supporting salt) were dissolved in 4-cyano-4'-pentylbiphenyl (5CB) as a host liquid crystal to prepare a chiral liquid crystal electrolyte. The electrolyte exhibited a fingerprint structure under observation of polarizing optical microscopy. For the electrochemical polymerization reaction, the electrolyte solution is charged in the cell consisted of two indium-tin-oxide (ITO) glass plates as electrodes and a poly(tetrafluoroethylene) spacer (200 μm thickness). Next, dc voltage of 3.0 V was applied to the ITO glass cell for 30 min for electrochemical polymerization. The polymer was deposited on the anode electrode as a thin film form. After polymerization, the remaining electrolyte solution on the ITO glass electrode was carefully washed with a large amount of hexane, yielding dark blue film. This film is abbreviated as Alloy1. The molecular structure was confirmed by infrared spectroscopy with the KBr method. Alloy1 shows a fingerprint structure under POM observations (Figure 1b). The macroscopic structure of cholesteric liquid crystal was transcribed from the liquid crystal electrolyte solution to Alloy1. Synchrotron XRD measurement was carried out. The peak at 10.3 Å is derived from monomer repeat units. The XRD signal at 5.1 Å and 3.4 Å can be derived from π-stacking of Alloy1. Alloy1 shows UV-vis absorption due to the three signals derived from π-π* transition of the main chain, polarons (radical cations) and bipolarons (radical dications). Electrochemical properties of Alloy1 were evaluated by the cyclic voltammetry (CV). Alloy1 film deposited on the ITO glass was used as a working electrode. An Ag/Ag+ electrode and a platinum wire served as the reference and counter electrodes, respectively. A propylene carbonate solution with 0.1 M of TBAP was employed as an electrolyte solution for the CV measurements. Cyclic voltammograms of Alloy1 shows the oxidation peak and reduction trough (Figure 1c). Plots of the oxidation peak current (I pa) and the reduction peak current (I pc) as a function of the square root of the scan rate show a linear shape of the anodic and cathodic peak current values when scan rates from 10 to 100 mV/s with intervals of 10 mV/s. This result indicated that the redox reaction of Alloy1 was reversible and controlled by electron transfer processes. In-situ circular dichromism (CD) and in-situ optical rotatory dispersion (ORD) spectra of Alloy1 with application of voltages were examined in a propylene carbonate solution with 0.1 M of TBAP. The application voltages were between 0-1.2 V (vs. Ag/Ag+) with intervals of 0.1 V. A negative Cotton effect was observed from the in-situ CD, indicating Alloy1 has left-handed helical structure. The ORD shows negative signals, and changes with applied voltage. The ellipticity signal in the CD and optical rotation in the ORD could control in the electrochemical method, accompanied by electrochemical redox process. We synthesized the polymer alloy by electrochemical polymerization in chiral liquid crystal. The conjugated polymer alloy showed chirality with no chiral centers in the main chain. The CD and ORD bands at NIR range are assigned to doping band as a form of polarons (radical cations). This research evaluated electrochemical control of “chiralions”. Figure 1

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42

Della Corte, Christopher. "Novel Super-Elastic Materials for Advanced Bearing Applications." Advances in Science and Technology 89 (October 2014): 1–9. http://dx.doi.org/10.4028/www.scientific.net/ast.89.1.

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Tribological surfaces of mechanical components encounter harsh conditions in terrestrial, marine and aerospace environments. Brinell denting, abrasive wear and fatigue often lead to life-limiting bearing and gear failures. Novel superelastic materials based upon Nickel-Titanium (NiTi) alloys are an emerging solution. NiTi alloys are intermetallic materials that possess characteristics of both metals and ceramics. NiTi alloys have intrinsically good aqueous corrosion resistance (they cannot rust), high hardness, relatively low elastic modulus, are chemically inert and readily lubricated. NiTi alloys also belong to the family of superelastics and, despite high hardness, are able to withstand large strains without suffering permanent plastic deformation. In this paper, the use of a hard, resilient NiTi alloy for corrosion-proof, shockproof bearing and gear applications is presented. Through a series of bearing and gear development projects, it is demonstrated that NiTi’s unique blend of material properties lead to significantly improved load capacity, reduced weight and intrinsic corrosion resistance not found in any other bearing materials. NiTi thus represents a new materials solution to demanding tribological applications.

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43

Yisa Tufion Albert, Waindim, Gundu David T., Ashwe A., and Aondoyila Kuhe. "PERFORMANCE EVALUATION OF BLACK SOAP (TOILET SOAP) BLENDED WITH DE-OILED JATROPHA CAKE ADDITIVE AS SOLID LUBRICANT IN DIRECT COLD EXTRUSION OF ALUMINIUM ALLOYS." International Journal of Engineering Science Technologies 6, no. 4 (August 19, 2022): 66–83. http://dx.doi.org/10.29121/ijoest.v6.i4.2022.368.

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The use of petro-lubricants in metal forming leads to lamination of oxide on the extrudates due to temperature increase and reaction of the base metal with some elements in the lubricant, hence resulting poor surface quality of the end product. The non-biodegradability of these lubricants also leads to environmental pollution. Although De-oiled Jatropha Caked has been volarised for so many applications, with some oil left in the cake it can still be employed for use in other applications. In this paper a bio-solid lubricant is formulated from Black soap (Toilet soap-vegetable oil-based) as base and De-oiled Jatropha cake as additive. Jatropha seeds were processed to ≤ 0.5 um particles size powder and de-oiled using Soxhlet apparatus. Black soap and de-oiled Jatropha cake was then mixed in ratios: 90:10, 80:20, 70:30, 60:40 and 50:50. Each of these was further mixed with de-ionized lukewarm water in ratio 50:50 by weight to produce solid lubricant blends B1, B2, B3, B4 and B5, respectively. Each of the Black soap-enriched solid lubricant blends were then used to test for coefficient of friction on mirrored surface prepared aluminum specimens using Ball-on-disc Tribometer. The solid lubricant blends were again used to conduct Extrusion tests on Ø25.4 mm by 25.4mm aluminum alloy billets in direct cold extrusion process on a 2000 KN capacity UT CO821 machine. The results showed blend B3 (70:30) recording the minimum coefficient of friction and extrusion force values μ=0.732 and 170.53KN, respectively. These results reveal that enriched solid lubricant B3 (70:30) is most suitable for aluminum alloys extrusion.

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Chen, Yitao, Cesar Ortiz Rios, Braden McLain, Joseph W. Newkirk, and Frank Liou. "TiNi-Based Bi-Metallic Shape-Memory Alloy by Laser-Directed Energy Deposition." Materials 15, no. 11 (June 1, 2022): 3945. http://dx.doi.org/10.3390/ma15113945.

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In this study, laser-directed energy deposition was applied to build a Ti-rich ternary Ti–Ni–Cu shape-memory alloy onto a TiNi shape-memory alloy substrate to realize the joining of the multifunctional bi-metallic shape-memory alloy structure. The cost-effective Ti, Ni, and Cu elemental powder blend was used for raw materials. Various material characterization approaches were applied to reveal different material properties in two sections. The as-fabricated Ti–Ni–Cu alloy microstructure has the TiNi phase as the matrix with Ti2Ni secondary precipitates. The hardness shows no high values indicating that the major phase is not hard intermetallics. A bonding strength of 569.1 MPa was obtained by tensile testing, and digital image correlation reveals the different tensile responses of the two sections. Differential scanning calorimetry was used to measure the phase-transformation temperatures. The austenite finishing temperature of higher than 80 °C was measured for the Ti–Ni–Cu alloy section. For the TiNi substrate, the austenite finishing temperature was tested to be near 47 °C at the bottom and around 22 °C at the upper substrate region, which is due to the repeated laser scanning that acts as annealing on the substrate. Finally, the multiple shape-memory effect of two shape-memory alloy sides was tested and identified.

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Rigana Begam, M., N. Madhusudhana Rao, Girish M. Joshi, S. Kaleemulla, M. Shobana, N. Sai Krishna, and M. Kuppan. "Structural, Optical, and Magnetic Properties of Co Doped CdTe Alloy Powders Prepared by Solid-State Reaction Method." Advances in Condensed Matter Physics 2013 (2013): 1–5. http://dx.doi.org/10.1155/2013/218659.

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Co doped CdTe powder samples were prepared by solid-state reaction method. In the present work effect of Co doping on structural, optical, and magnetic properties has been studied. X-ray diffraction studies confirm zinc blend structure for all the samples. The lattice parameter showed linear increase with the increase in Co content. The elemental constituents were characterized by EDAX. Optical studies showed the increase in band gap with increase in Co level. The samples were diluted magnetic semiconductors and exhibited clear hysteresis loop showing room temperature ferromagnetism as confirmed by vibrating sample magnetometer.

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Keshavarz, Mohsen K., Alexandre Gontcharov, Paul Lowden, Anthony Chan, Devesh Kulkarni, and Mathieu Brochu. "Turbine Blade Tip Repair by Laser Directed Energy Deposition Additive Manufacturing Using a Rene 142–MERL 72 Powder Blend." Journal of Manufacturing and Materials Processing 5, no. 1 (March 1, 2021): 21. http://dx.doi.org/10.3390/jmmp5010021.

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Laser directed energy deposition (LDED) was used with a powder blend comprising 75 wt.% Rene 142 and 25 wt.% of Merl 72 (4275M72) for turbine blade tip repair applications. Sound samples could be deposited at ambient temperature on Haynes 230. The microstructural analyses showed the presence of fine gamma prime precipitates in the as-deposited samples, while after aging, the alloy possessed around 40 vol.% with a bimodal precipitate size distribution. Also, the alloy contained Ta-Hf-W carbides in different sizes and shapes. Tensile testing from room temperature up to 1366 K was performed. The 4275M72 deposits possessed higher tensile properties compared to Rene 80 in this temperature range but lower elongations at the elevated temperatures. The creep properties of 4275M72 samples at 1255 K were superior to Rene 80. Also, the oxidation resistance of deposited 4275M72 was similar to Rene 142. The combination of high mechanical properties, creep behavior, and oxidation resistance of LDEDed 4275M72 makes it a suitable alloy for tip repair of turbine blades.

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Laokijcharoen, Pasaree, and A. Y. Coran. "The Evolution of Morphology in NR/HDPE Blends. Part I. Microscopy for Unvulcanized Blends." Rubber Chemistry and Technology 71, no. 5 (November 1, 1998): 966–74. http://dx.doi.org/10.5254/1.3538522.

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Abstract Phase morphology is an important factor in the determination of properties of polymer blends. In this work, methods for determining phase morphology of unvulcanized natural rubber (NR)/high-density polyethylene (HDPE) blends were investigated. Small, quick-quenched samples were taken from the internal mixer for examination under scanning electron microscopy (SEM). There was almost no interruption of the mixing because the sampling device was designed for preventing the coalescence of dispersed particles. Three specimen-preparation methods for SEM were considered: (i) OsO4 vapor staining, followed by carbon coating; (ii) toluene etching of NR phase at room temperature, followed by coating of the surface with a platinum alloy; (iii) crosslinking of NR phase by S2Cl2 vapor and then etching of HDPE phase by using boiling xylene. Method (i), OsO4 staining of cryogenic microtomed samples, was selected for the work on the kinetics of dispersion during the mixing process. Vast differences in phase morphology were observed among the types of samples: quick quenched, cold pressed, and compression molded. We considered the quick-quenched samples to have the phase morphology, which was the most similar to that of the blend during its mixing.

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Oh, Sora, Chang Eun Song, Taeho Lee, Ara Cho, Hang Ken Lee, Jong-Cheol Lee, Sang-Jin Moon, Eunhee Lim, Sang Kyu Lee, and Won Suk Shin. "Enhanced efficiency and stability of PTB7-Th-based multi-non-fullerene solar cells enabled by the working mechanism of the coexisting alloy-like structure and energy transfer model." Journal of Materials Chemistry A 7, no. 38 (2019): 22044–53. http://dx.doi.org/10.1039/c9ta07919j.

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A simple-structured nonfullerene acceptor (NFA), T2-ORH, consisting of a bithiophene core and octyl-substituted rhodanine ends is utilized as the third component in ternary-blend solar cells with PTB7-Th and EH-IDTBR as host materials.

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Yang, H. J., Y. M. Gao, and W. C. Qin. "Corrosion inhibition of 3003 aluminum alloy by cerium chloride-sodium nitrite blend in flue gas condensate." Materials and Corrosion 68, no. 11 (July 7, 2017): 1246–59. http://dx.doi.org/10.1002/maco.201709487.

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Lu, Hongwei, Jianxin Du, Huilong Zhang, Xiaojie Guo, Jiayou Du, Yishan Zhang, Chenxiang Li, Linxi Dong, and Yingxin Chen. "High energy storage capacitance of defluorinated polyvinylidene fluoride and polyvinylidene fluoride blend alloy for capacitor applications." Journal of Applied Polymer Science 137, no. 36 (February 23, 2020): 49055. http://dx.doi.org/10.1002/app.49055.

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Journal articles on the topic 'Alloy blend'

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