Journal articles: 'Abrasives'

1

Perec, Andrzej. "Disintegration and recycling possibility of selected abrasives for water jet cutting." DYNA 84, no. 203 (October 1, 2017): 249–56. http://dx.doi.org/10.15446/dyna.v84n203.62592.

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Este trabajo presentó un estudio de la desintegración abrasiva en un chorro de agua abrasivo de 400 MPa (AWJ). El tamaño y la distribución de partículas abrasivas juegan un papel importante en el mecanizado y la eficacia de corte de los chorros de agua abrasiva. Abrasivo de granate probado, comúnmente utilizado en el tratamiento con chorro de agua abrasivo y corindón. Es de interés científico observar la desintegración de estas partículas que han sido interactivas con materiales abrasivos poco comunes. El impacto del tiempo de los granos abrasivos en la pieza de trabajo es muy corto y no todo el grano en la corriente de poder hacer el trabajo de corte, debe esperar la posibilidad de recuperar el tratamiento abrasivo. Considerable importancia es el aumento en la capacidad de corte de granos triturados debido a revelar nuevos bordes de corte. Con base en un estudio de factibilidad, este documento presentará algunos resultados sobre los datos de corte obtenidos y muestra también el desgaste del tubo de enfoque utilizado, la principal parte responsable de la formación del chorro.

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2

Wang, Shujun, Yusheng Zhang, Shuo Meng, Yugang Zhao, and Jianbing Meng. "Investigation of Synthesis, Characterization, and Finishing Applications of Spherical Al2O3 Magnetic Abrasives via Plasma Molten Metal Powder and Powder Jetting." Micromachines 15, no. 6 (May 28, 2024): 709. http://dx.doi.org/10.3390/mi15060709.

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Magnetic abrasive finishing (MAF) is an efficient finishing process method using magnetic abrasive particles (MAPs) as finishing tools. In this study, two iron-based alumina magnetic abrasives with different particle size ranges were synthesized by the plasma molten metal powder and powder jetting method. Characterization of the magnetic abrasives in terms of microscopic morphology, phase composition, magnetic permeability, particle size distribution, and abrasive ability shows that the magnetic abrasives are spherical in shape, that the hard abrasives are combined in the surface layer of the iron matrix and remain sharp, and that the hard abrasives combined in the surface layer of the magnetic abrasives with smaller particle sizes are sparser than those of the magnetic abrasives with larger particle sizes. The magnetic abrasives are composed of α-Fe and Al2O3; the magnetic permeability of the magnetic abrasives having smaller particle sizes is slightly higher than that of the magnetic abrasives having larger particle sizes; the two magnetic abrasives are distributed in a range of different particle sizes; the magnetic abrasives have different magnetic permeabilities, which are higher than those of the larger ones; both magnetic abrasives are distributed in the range of smaller particle sizes; and AZ31B alloy can obtain smaller surface roughness of the workpiece after the grinding process of the magnetic abrasives with a small particle size.

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3

Han, Quan Li, and Wen Ming Zhang. "Surface Roughness and Morphology of Titanium Plate Ground with Fixed and Loose Brown Alumina Abrasives." Advanced Materials Research 126-128 (August 2010): 1019–22. http://dx.doi.org/10.4028/www.scientific.net/amr.126-128.1019.

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Titanium is a metal material which has many excellent properties; it has been widely used in many fields. In this paper, plane abrasive machining is carried out for Titanium plate. The surface roughness and morphology of Ti-plate is compared after fixed and loose abrasive machining. The experiment proved that the drop magnitude of Ra in loose abrasives machining is great larger than that in fixed abrasive when grit size is nearly equal, and the improvement of surface defect such as some directional marks, deep scratch and bits in loose abrasives machining is rapider and quicker than that in fixed abrasives during same machining time. The results of experiments indicts that loose abrasive machining is better than fixed abrasive in reducing surface roughness and improving surface morphology, since the higher density of active abrasives and machining force uniformity.

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4

Shuto, Takahiro, Yuichi Mine, Seicho Makihira, Hiroki Nikawa, Takanori Wachi, and Kazutoshi Kakimoto. "Alterations to Titanium Surface Depending on the Fluorides and Abrasives in Toothpaste." Materials 15, no. 1 (December 22, 2021): 51. http://dx.doi.org/10.3390/ma15010051.

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Fluoride and abrasives in toothpastes may cause corrosion and deterioration of the titanium used for implants and other prostheses. The purpose of this study was to investigate how the presence or absence and types of fluoride and abrasives affected the titanium surface texture. Brushing with toothpastes was performed on pure-titanium discs using an abrasive testing machine. Unprocessed titanium discs without brushing were used as control samples. Surface roughness, color, and gloss of titanium were measured and the differences compared with the control were analyzed. Additionally, titanium surfaces and abrasives in toothpastes were observed using a scanning electron microscope to compare the surface texture of each sample. Some toothpastes (abrasive+) significantly increased the difference in surface roughness, color, and gloss, compared with ultrapure water. Toothpaste (fluoride+/abrasive+) that had many polygonal abrasive particles led to the largest color differences and exhibited notable scratches and a larger number of contaminant- or corrosion-like black spots. In contrast, brushing with toothpaste without fluoride or abrasives (fluoride−/abrasive−) caused little change to the titanium surface. These results suggest that both fluoride and abrasives in toothpaste used for brushing may be factors that affect surface texture and corrosion resistance of titanium.

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5

Li, Wei, Qiu Sheng Yan, Jia Bin Lu, and Ji Sheng Pan. "Effect of Abrasives on the Lapping Performance of 6H-SiC Single Crystal Wafer." Advanced Materials Research 690-693 (May 2013): 2179–84. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.2179.

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In order to remove the cutting marks on the cutting surface of 6H-SiC single crystal wafer, experiments were conducted to investigate the effect of the abrasive characteristics (types, grain size, concentration and mixed abrasives) on the lapping performance of 6H-SiC single crystal wafer, then the removal mechanism of the abrasive grains in the lapping process was studied. Results indicate that the abrasives with larger grain size and higher hardness can result in a higher material removal rate while the abrasives with smaller grain size and lower hardness can achieve a lower surface roughness value. When the concentration of the abrasives is 7.69 wt%, a good lapping effect was obtained. Lower surface roughness value Ra can be obtained with a high material removal rate by using certain proportion mixed abrasives. Selecting appropriate abrasives can obtain a high surface quality of 6H-SiC wafer with a high efficiency.

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6

Li, Yan, Hang Gao, and Ren Ke Kang. "Study on Removal and Embedding Mechanism of CdZnTe Using Loose Abrasive." Advanced Materials Research 24-25 (September 2007): 201–10. http://dx.doi.org/10.4028/www.scientific.net/amr.24-25.201.

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Cd1−xZnxTe (CZT) is an excellent ternary compound semiconductor. CZT is the most suitable substrate material for Hg1−yCdyTe epitaxial growth and can make the detector itself. The researchers have done a lot of works on the hard and brittle material removal mechanism in lapping process. however, no published articles are available regarding the removal mechanism and the abrasives embedding mechanism of the soft and brittle material in lapping progress .and there is its own characteristic if the hard abrasives machining the soft and brittle material in lapping progress, the objective of this paper is to build the physical model ,and divide the abrasive into four kinds of abrasives , they are two-body abrasive ,three-body abrasive ,embedded abrasive and small abrasive, and the authors analyze the effects on the material surface of the above abrasives. At last, design series of experiments, through analyzing the results and observe the surface morphology, the authors prove that the physical model is correct.

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7

Tsai, Feng Che, Ting Cheng Chang, Miao Yu Kuo, and Ta Chen Li. "The Investigation of Abrasive Jet Polishing on the Linear Micro-Channels Surface of SKD61 Mold Steel." Advanced Materials Research 652-654 (January 2013): 1799–804. http://dx.doi.org/10.4028/www.scientific.net/amr.652-654.1799.

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This study examined the performance of abrasive jet polishing (AJP) on SKD61 mold surfaces using wax-coated SiC abrasives fabricated by gas atomization and the comparison of surface quality achieved by revealing significant surface roughness reduced with wax-coated abrasives. The wax coating of SiC abrasives smooth the sharp surfaces of abrasive powders and provides a cushioning buffer. These two features contribute and improve the direct impact of heavy peening, thus preventing surface hardening, superficial embedment or deep scratches. Furthermore, compound additives including water wax and water were added to the wax-coated #3000 SiC abrasives at a mix proportion of 500: 1000: 1500 (water wax: wax-coated SiC: water) for polishing micro-channels surfaces. The experimental results show that the compound additives provide addition cushioning effect facilitate the sliding and grinding of abrasives, resulting in fine polishing and good surface quality. The reflection properties of both linear and curved micro-channels were much enhanced by AJP using wax-coated #3000 SiC abrasives with the compound additives.

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8

Niżankowski, Czesław. "History and prospects of abrasive development." Mechanik 90, no. 11 (November 13, 2017): 1003–5. http://dx.doi.org/10.17814/mechanik.2017.11.163.

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Division and classification of abrasives development periods is discussed. Abrasives of natural origin and hard and super hard synthetic abrasive currently used in the industry, are presented. The prospects of the appearance of ultra-hard abrasives in the form of hexagonal lonsdaleite and metallic hydrogen, are indicated.

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9

Tsai, Feng Che, Shie Chen Yang, Tsuo Fei Mao, Chi Jung Chen, and Shiou Shen Liou. "Abrasive Jet Polishing of Micro Groove Using Compound SiC Abrasives with Compound Additives." Advanced Materials Research 418-420 (December 2011): 2153–57. http://dx.doi.org/10.4028/www.scientific.net/amr.418-420.2153.

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This Study Examined the Performance of Abrasive Jet Polishing (ajp) on Skd61 Mold Surfaces Using Wax-coated Sic Abrasives Fabricated by Gas Atomization. Comparison of Surface Quality Achieved Reveals Significant Surface Roughness Reduction by Wax-coated Abrasives. the Wax Coating Not only Covers Most of the Sharp Ends of the Abrasive, Thus Making Smooth the Abrasive Surface; it Being Elastic Also Provides a Cushioning Buffer. these Two Features Contribute to Ameliorate the Direct Impact of Heavy Peening, Thus Preventing Surface Hardening, Superficial Embedment or Deep Scratches. Moreover, Compound Additives Including Water Wax and Water Were Added to the Wax-coated #3000 Sic Abrasives at a Mix Proportion of 500: 1000: 1500 (water Wax: Wax-coated Sic: Water) for Polishing Mold Surfaces of Different Forms. Results Show that the Compound Additives Provide Addition Cushioning Effect and Facilitate the Sliding and Grinding of Abrasives, Resulting in Fine Polishing and Good Surface Quality. the Reflection Property of Micro-groove Was much Enhanced by Ajp Using Wax-coated #3000 Sic Abrasives with the Compound Additives.

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10

Li, Jun, P. Gao, Yong Wei Zhu, B. Li, Y. L. Sun, and D. W. Zuo. "Research on Subsurface Damage After Abrasives and Fixed-Abrasive Lapping of K9 Glass." Key Engineering Materials 487 (July 2011): 253–56. http://dx.doi.org/10.4028/www.scientific.net/kem.487.253.

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Fixed-abrasive lapping (FAL) is a new machining technology and is adopted to manufacture hard brittle materials to obtain the high surface quality. In the same machining condition, K9 glasses are lapped by abrasives and fixed-abrasive, respectively. Two grain sizes of diamond abrasives are adopted in every lapping means. Differential chemical etch method (DCEM) is employed to measure the depth of subsurface damage (SSD) of different lapping means. Surface damages are compared by Microscope. The results show that the depth of SSD is 53 and 15.2μm after abrasives lapping (AL) by 40 and 28μm diamond abrasives. FAL with 40 and 28μm diamond abrasive leads to 4.5 and 3.4μm subsurface damage depth, respectively. FAL can get smaller surface damage and shallower depth of SSD than AL. And FAL can obtain the higher surface quality than AL.

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11

Cao, Xiaojun, Mingpu Xue, Zhichao Qi, Zhongtang Li, and Jianxiu Su. "Influence of Abrasive Hardness on Chemical Mechanical Polishing of 304 Stainless Steel." Journal of Physics: Conference Series 2329, no. 1 (August 1, 2022): 012044. http://dx.doi.org/10.1088/1742-6596/2329/1/012044.

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Abstract In order to improve the quality in chemical mechanical polishing (CMP) of stainless steel and the material removal rate (MRR), 6 kinds of abrasives were used to do the CMP test of 304 stainless steel. In this paper, the 6 kinds of abrasives have different hardness. The experimental results show that, in the CMP process, the MRR increases with the increase of the abrasive hardness, the surface roughness decreases firstly and then raises with the increase of the abrasive hardness. This surface roughness reduces the lowest value when the chromium oxide (CrO) abrasive is used. With low-hardness copper oxide abrasives and magnesium oxide abrasives, it can only remove partial scratches on the surface during the polishing process and obtained low MRR and poor surface quality. Silica abrasives were easy to condense in the polishing slurry and the Gelation hindered the cutting action of abrasive, So resulting in low MRR and poor surface quality. The chromium oxide and white corundum, their hardness are close to the stainless steel, can remove the surface oxide layer of the sample while not produce the damage of the workpiece surface, so the surface quality was very well. Considering that chromium oxide contains Cr2+, it will pollute the environment. Therefore, in comprehensive consideration of the surface quality and MRR, take the white corundum as an abrasive in the CMP of 304 stainless steel.

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12

Yang, Jian Dong, Chuang Liu, and Hui Yan. "Lapping Tool Wearing Uniformly in Machining Blind Hole of Workpiece in Manufacturing System." Applied Mechanics and Materials 252 (December 2012): 310–14. http://dx.doi.org/10.4028/www.scientific.net/amm.252.310.

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This paper proposes a new method of controlling abrasives density distribution on the machining surface of a lapping tool making full use of controllability of abrasives density distribution in solid abrasive lapping, based on the present actual problems in solid abrasive lapping blind holes in manufacturing process. This method makes the abrasives density distribution on the lapping tool surface fit the wear intensity distribution of lapping tool, which makes the lapping tool wear uniformly in this manufacturing process, does not lose its original surface accuracy, ensures shape accuracy of the machined holes of the workpiece, also avoids the trouble of dressing lapping tools, reduces auxiliary machining time, improves machining efficiencies, reduces the consumption of abrasives and reduces machining costs of the manufacturing process.

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13

Zulkarnain, Iskandar, Nor Adila Mohamad Kassim, M. I. Syakir, Azhar Abdul Rahman, Mohamad Shaiful Md Yusuff, Rosdin Mohd Yusop, and Ng Oon Keat. "Sustainability-Based Characteristics of Abrasives in Blasting Industry." Sustainability 13, no. 15 (July 21, 2021): 8130. http://dx.doi.org/10.3390/su13158130.

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The abrasive blasting industry is identified as the most unsafe operation in terms of potential exposure to airborne crystalline silica. This is due to the free silica content in the common abrasives that are used for blasting activities. This paper will identify a sustainability-based or green blasting media to replace free silica content abrasives for blasting activities. The characteristics of sustainability-based abrasives are determined based on systematic review procedure. The combination keywords of “Abrasive blasting”, “Garnet’’, “Free Silica Media”, “Sustainable blasting”, “Eco-friendly blasting”, “Glass Bead blasting” and “Green blasting” were used to collect the existing studies on abrasive blasting operations. Six characteristics of green abrasives were identified: (1) zero content of free silica, (2) high efficiency and productivity, (3) low consumption media (4) low amount of waste generation and emission potentials (5) high recyclability and (6) environmentally friendly in line with sustainable development goals SDG3, SDG12, SDG13, SDG14 and SDG15. The application of green abrasives as substitution to free silica media is therefore important not only for safety and health reasons, but also for the environmental protection and sustainable business operations.

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14

Sun, Yu Li, Dun Wen Zuo, Jun Li, Wen Zhuang Lu, and Z. Z. Yu. "Computer Simulation on the Motion Tracks of Ice Fixed Abrasives Polishing." Key Engineering Materials 426-427 (January 2010): 376–80. http://dx.doi.org/10.4028/www.scientific.net/kem.426-427.376.

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Ice fixed abrasives (IFA) polishing is a novel ultra-precision machining method. The motion tracks of abrasives during IFA polishing have an important effect on the quality of the machined silicon wafer. Firstly, the motion tracks of IFA polishing are theoretically analyzed in this paper. It is founded that the paths of any point in the IFA polishing pad relative to the wokpiece are a group of cycloids. Then, the motion tracks of single abrasive and multiple abrasives in the IFA polishing pad are simulated respectively. The results show that increasing the eccentricity is beneficial to the enlargement of the size range of polishing process. With the increasing of the speed ratio between the IFA polishing pad and the workpiece, the abrasive at higher speed can leave longer tracks on the workpiece than that at lower speed at the same time. The more the abrasives, the more uniform the mark density under the influence of more abrasives.

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15

Shih, Cheng Yi, Pei Lum Tso, and James C. Sung. "Analysis of Fixed Abrasive Pads with a Nano-Sized Diamond for Silicon Wafer Polishing." Advanced Materials Research 76-78 (June 2009): 410–15. http://dx.doi.org/10.4028/www.scientific.net/amr.76-78.410.

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Current polishing pads cannot polish a workpiece without using slurry with free abrasive. The new slurry is required to be continually poured into the working area, so more than half of the slurry may be lost from the table without contacting the wafer surface; this leads to economic and environmental problems. In the current work, the fixed abrasive pad was used, where nano-sized diamond abrasives were embedded in the polishing pad; distilled water, rather than slurry, was used. The effect of various fixed abrasive pad designs on polishing characteristics during silicon wafer polishing was investigated. Moreover, the primary function of fixed abrasive was to remove the rough parts of silicon wafer as they were being polished. Consequently, it needed to disperse the nano-sized abrasives into the pad material with high hardness value; this way, working abrasives are not pressed into the pad material. Furthermore, with the use of a pad conditioner, the interior working abrasives were exposed to the pad surface. As a result, the best outcome of using the fixed abrasive pad with a nano-sized diamond was a surface roughness of Ra 0.47 nm.

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Patil, Mahadev Gouda, Kamlesh Chandra, and P. S. Misra. "Study of Magnetic Abrasive Finishing Using Mechanically Alloyed Magnetic Abrasives." Advanced Materials Research 585 (November 2012): 517–21. http://dx.doi.org/10.4028/www.scientific.net/amr.585.517.

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The finishing characteristics of mechanically alloyed magnetic abrasives used in cylindrical magnetic abrasive finishing (MAF) are presented in this study. Mechanical alloying is a solid state powder processing technique, where the powder particles are subjected to impact by the balls in a high energy ball mill or attritor at room temperature. After the process, fine magnetic abrasives are obtained in which the abrasive particles are attached to the base metal matrix without any bonding material. The magnetic particle used in the magnetic abrasive production is iron powder and the abrasive is aluminium oxide. Magnetic abrasives play the role of cutting tools in MAF, which is emerging as an important non-conventional machining process. The experiments performed on stainless steel tubes examine the effects of varying the quantity of magnetic abrasives, magnetic flux density, speed of rotation of the workpiece and amount of lubricant. The surface roughness measurements demonstrate the effects of the abrasive behaviour on the surface modification. The surface roughness was analysed in terms of percentage improvement in surface finish (PISF). The obtained maximum PISF was 40 % and the minimum surface roughness was 0.63 μm Ra.

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17

Wang, Jin Sheng, Chao Wang, and Zi Fa Li. "Research Progress of Sawing Mechanism for Free Abrasive Wire Saw." Applied Mechanics and Materials 446-447 (November 2013): 414–17. http://dx.doi.org/10.4028/www.scientific.net/amm.446-447.414.

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The wire saw for slicing wafers process is free abrasive machining process. In this paper, we summarize the sawing mechanism for free abrasive wire saw, and think that the sawing mechanism is mainly rolling-indenting removal. But there are two forms of the force which causing the abrasives to roll and indent in the workpiece surface, one form the force acts on the abrasives by shear stress and hydrodynamic pressure, another form the force acts on the abrasives by wire saw. We design an experiment to verify the form of the force, and think that the second form of the force mainly causes the abrasive to roll and indent in the workpiece surface.

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18

Lin, Yanfen, Congfu Fang, and Lizhen Gao. "Adhesive Abrasive Detection for Diamond Images based on Improved Watershed Algorithm." Journal of Physics: Conference Series 2289, no. 1 (June 1, 2022): 012023. http://dx.doi.org/10.1088/1742-6596/2289/1/012023.

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Abstract Diamond images have characteristics of adhesive abrasives besides much background noise, irregular abrasive shapes and different abrasive size, which brings big challenges to accurate diamond abrasive detection. Therefore, an improved watershed algorithm is put forward to detect adhesive abrasive in this work. Firstly, the diamond abrasive image is filtered by Gaussian to suppress the background noise, and then the pre-processed diamond abrasive image is reconstructed by morphology. Through the distance transform of the reconstructed image, marking features for subsequent abrasive detection can be obtained. Finally, the watershed algorithm and extended-minima transform are used to finely detect diamond abrasives and separate adhesive abrasives, respectively, so as to realize the accurate detection of adhesive diamond abrasive image. According to the results of detection experiments, the proposed method based on improved watershed algorithm and extended-minima transform can accurately detect adhesive diamond abrasive images, the recall rate of abrasive is 94.8%, which indicates good recognition accuracy and robustness of the proposed method. The accurate detection results can be further used for subsequent image analysis and abrasive feature parameter extraction.

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19

Park, Jin-Hyung, Hao Cui, Sok-Ho Yi, Jea-Gun Park, and Ungyu Paik. "Effect of abrasive material properties on polishing rate selectivity of nitrogen-doped Ge2Sb2Te5to SiO2film in chemical mechanical polishing." Journal of Materials Research 23, no. 12 (December 2008): 3323–29. http://dx.doi.org/10.1557/jmr.2008.0397.

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We investigated the polishing rate and selectivity of nitrogen-doped Ge2Sb2Te5(NGST) to SiO2film for different abrasive materials (colloidal silica, fumed silica, and ceria abrasives). They both were strongly dependant on abrasive material properties. The polishing rate of nitrogen-doped NGST decreased in the order ceria, fumed silica, and colloidal silica abrasives, which was determined by abrasive material properties, such as abrasive hardness, crystal structure, and primary and secondary abrasive sizes. In addition, the polishing rate slope of NGST film was not significantly different for different abrasive materials, indicating that the polishing of NGST film is mechanical dominant polishing. In contrast, the polishing rate slope of SiO2film decreased in the order ceria, fumed silica, and colloidal silica abrasives, indicating that the polishing of SiO2film is chemical dominant polishing. Furthermore, the difference in polishing rate slopes between NGST and SiO2film gave a polishing rate selectivity of NGST to SiO2film higher than 100:1 with colloidal silica abrasive.

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Hanada, Kotaro, and Hitomi Yamaguchi. "Development of Spherical Iron-Based Composite Powder with Carried Alumina Abrasive Grains by Plasma Spray." Advanced Materials Research 75 (June 2009): 43–46. http://dx.doi.org/10.4028/www.scientific.net/amr.75.43.

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This paper describes the development of spherical iron-based composite powder with carried alumina abrasive grains made by a plasma spray technique. Carbonyl iron powder (7.2 μm average size) and alumina abrasive grains (0.3 μm average size) are sprayed into the plasma flame from the respective nozzles simultaneously, or their mechanical mixture is directly plasma-sprayed. In case of the composite powder obtained by the direct spray method, the alumina abrasives are well carried on the carbonyl iron particles. However, a plasma current of more than 100 A causes melting and vaporizing of the alumina abrasives;, consequently the carbonyl iron and alumina abrasives are separated. The magnetic abrasive experiments with the composite powder developed are made for SUS304 stainless steel plate, and the result shows that the developed composite powder has high potential abrasive performance.

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Li, Zhi Hong, H. F. Zheng, Y. M. Zhu, and Q. M. Yuan. "Study on the Performance of CBN Abrasives with Ti Coatings." Key Engineering Materials 280-283 (February 2007): 1395–98. http://dx.doi.org/10.4028/www.scientific.net/kem.280-283.1395.

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In this paper, the performances of CBN abrasives with and without Ti coatings and their changes during heat treatment were investigated under the same conditions. The results showed that the single particle compressive strength and the impact toughness for CBN abrasives with Ti coatings were lower than these of CBN abrasives without Ti coating. Ti coating on the surface of CBN abrasive particles oxidized and formed TiO2 with discontinuous structure at above 650°C during the firing process. The poor oxidation resistance of Ti coating and the discontinuous structure of its oxidation product could not protect CBN abrasives from heat damage, therefore could not improve properties of CBN abrasives.

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Biddut, A. Q., Liang Chi Zhang, Y. M. Ali, and Zong Wen Liu. "Achieving a Damage-Free Polishing of Mono-Crystalline Silicon." Key Engineering Materials 389-390 (September 2008): 504–9. http://dx.doi.org/10.4028/www.scientific.net/kem.389-390.504.

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This paper experimentally investigates the micro-structural changes in mono-crystalline silicon induced by abrasive polishing with abrasive grain size and applied pressure. It was found that while the large abrasives of about 15 μm and 300 nm in diameter induce both residual amorphous phase and various residual crystalline structures and dislocations, the finer abrasives of about 50 nm in diameter only produce residual amorphous phase in the top subsurface of polished silicon. With the fine abrasives, reducing applied pressure reduces the amorphous layer thickness, and a damage-free polishing can be achieved at the pressure of 20 kPa.

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Che, Cui Lian, Chuan Zhen Huang, Jun Wang, Hong Tao Zhu, and Quan Lai Li. "Theoretical Model of Surface Roughness for Polishing Super Hard Materials with Abrasive Waterjet." Key Engineering Materials 375-376 (March 2008): 465–69. http://dx.doi.org/10.4028/www.scientific.net/kem.375-376.465.

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In this paper, the impact pressure of abrasives acting on the polished materials was deduced by Field Theory and the model of surface roughness for polishing super hard materials with Abrasive Water Jet (AWJ) was established. The model indicates that the surface roughness increases linearly with an increase in the maximum depth of abrasives indenting into materials and that the relationship between the surface roughness and polishing parameters including water pressure, abrasive pressure, the impact angle, the hardness of the polished material, the elastic distortion of abrasive, abrasive size, abrasive density, nozzle diameter and standoff.

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Xu, Xue Feng, H. F. Chen, H. T. Ma, B. X. Ma, and Wei Peng. "The Mechanism of Polymer Particles in Silicon Wafer CMP." Materials Science Forum 626-627 (August 2009): 231–36. http://dx.doi.org/10.4028/www.scientific.net/msf.626-627.231.

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In order to increase the material removal rate of silicon wafer, composite abrasives slurry was used in CMP. Zeta potential of polymer particle was measured and interaction potential energy between silica abrasives and polymer particles in slurry were analyzed and calculated. Adsorptions between silica abrasives and polymer particles were observed with TEM. CMP experiments had been taken to analyze the effects of polishing parameters (the concentration of colloidal silica and polymer particle, the pressure and the speed of polishing) on the material removal rate. The mechanism of polymer particle in polishing was elaborated. Experimental results indicated that PS, PMMA and BGF polymer particles could adsorb silica abrasives in slurry. Silica shell/PS core, silica shell/PMMA core and silica shell/BGF core particles could be used to formulate composite abrasives slurries. The material removal rate with composite abrasives slurry was higher than that of single abrasive slurry. The maximum material removal rate was obtained with silica shell/BGF core composite abrasives slurry.

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Wu, Xin, Hong Lei, and Ru Ling Chen. "Preparation of Porous Alumina Abrasives with Different Morphologies and their Chemical Mechanical Polishing Behavior." Advanced Materials Research 338 (September 2011): 415–20. http://dx.doi.org/10.4028/www.scientific.net/amr.338.415.

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The traditional solid alumina abrasive has been widely used in commercial slurries. But it is easy to cause polishing scratches due to its dense solid structure. The morphology of the abrasives can also impact on the chemical mechanical polishing (CMP) performances. To improve the CMP performances of the hard disk substrate, rods-like porous alumina and flower-like porous alumina abrasives were prepared and their chemical mechanical polishing behavior investigated. The results showed that the porous alumina abrasives with different morphologies exhibited lower topographical variations and surface roughness than solid alumina abrasives under the same testing conditions.

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Yue, Changsheng, Hong Cai, Lingrong Kong, Chenfan Liang, Zhijian Peng, and Yu Wang. "Wear Behaviors of AISI 4145H Drilling Tool Steel under Drilling Fluid Environment Conditions." Materials 15, no. 3 (February 6, 2022): 1221. http://dx.doi.org/10.3390/ma15031221.

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4145H steel is a commonly used material for downhole tools. However, up to now the wear behavior of 4145H drilling tool steel under real drilling fluid environment conditions is still not clear. In this work, this was investigated using a modified ASTM B611 rubber ring wet grinding test system, in which six kinds of abrasives (talc, dolomite or fluorite, as well as their mixed abrasive with quartz) with metal hardness-to-abrasive hardness ratios (H/HA) ranging from 0.25 to 6.25 were used in the drilling fluid for experiments. The results show that the H/HA value determined the wear mechanism of 4145H steel. When a single soft abrasive was used (with H/HA higher than 1.3–1.5), polishing was the dominantly observed mechanism. While mixed abrasives were applied, a microcutting mechanism due to the ploughing of hard abrasive particles on the steel surface was also observed. The increase in mass fraction of the soft abrasives has little effect on the wear rate of 4145H steel, but its wear rate will significantly increase as the mass fraction of hard abrasives increases. Therefore, in order to extend the life of drilling tools and reduce downhole accidents, the mass fraction of hard particles in the drilling fluid should be reduced as much as possible.

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Samra, Partap Singh, and Lakhvir Singh. "Analyzing Effect of Interactions of Process Parameters on Surface Finish of SUS304 Steel Roller Using RSM Technique." Asian Journal of Engineering and Applied Technology 1, no. 2 (November 5, 2012): 31–35. http://dx.doi.org/10.51983/ajeat-2012.1.2.2492.

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Finishing of cylindrical workpieces of SUS304 steel has been done using loosely bonded diamond based magnetic abrasives prepared by homogeneous mixing of magnetic powder (Fe powder of 300 mesh size (51.4μm)), abrasive powder (Diamond particles of 200 mesh size (41μm)), and lubricant. A central composite design involving four variables has been employed using RSM techniques to establish a mathematical model between parameters and response (percent improvement in surface finish), a series of experiments have been conducted using in-house fabricated setup. It has been found that magnetic flux density, quantity of magnetic abrasives, rotational speed of workpiece and percentage of abrasives in magnetic abrasives has significant effect on PISF. The maximum percentage improvement in surface finish was found to be 81% (0.04 μm Ra) at 1.0 Tesla of magnetic flux density, 40 mg of magnetic abrasives, 800 rpm as rotational speed of workpiece and 40% of abrasive. Scanning Electron Microscope (SEM) photographs shows that the surface generated by turning on lathe consists of deep scratches. The peaks have been sheared off to much smaller heights by MAF resulting in improved surface finish, but fine scratching marks produced by MAF appear on the surface.

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Widder, Lukas, Markus Varga, Karl Adam, and Andreas Kuttner. "Development of Impact Energy Distribution of Various Abrasives during Cyclic Impact/Abrasion Testing." Solid State Phenomena 267 (October 2017): 234–42. http://dx.doi.org/10.4028/www.scientific.net/ssp.267.234.

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In heavy industries like mining or steel production vast amounts of loose materials need to be transported, relocated or otherwise processed. During these routines severe stresses are applied on heavy machinery components such as excavator grabs and clamshells, which ultimately lead to excessive wear. The dominant wear mechanisms under such conditions are impact and abrasion. The focus of this paper is to investigate the fracture behaviour of various abrasives as experienced under real application in the steel industry. Breaking events of abrasive particles affect the impact energies on tool equipment. The Cyclic Impact/Abrasion Test rig (CIAT) was applied to investigate the stability and fracture behaviour of the abrasives. Rotating counter bodies made of martensitic quenched and tempered steel were used to generate impact events on loose abrasive particles. After certain time intervals the abrasives were screened and particle size fractions documented. Impact energy is strongly dependent on size and density, as well as fragility and cracking of particles. As fracturing events diminish particle dimensions and shift size distributions to lower size fractions, each abrasive showed a distinctive impact energy distribution over the course of the test duration. Impact energy distributions of abrasives were correlated to wear rates of the steel samples for each abrasive used. The results indicate a distinct behaviour of each abrasive, yielding certain impact energy distributions. Depending on processing specific abrasive goods in actual applications, impact energies and associated wear loss can differ significantly.

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Tanaka, Hideaki, H. Horita, Takehisa Yoshikawa, K. Iwatsuka, and Yukio Maeda. "Advanced Diamond Charging Process Using Vibrating Charging Ring in Fixed Abrasive Lapping." Advanced Materials Research 325 (August 2011): 502–7. http://dx.doi.org/10.4028/www.scientific.net/amr.325.502.

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In the lapping of magnetic heads and other electronic components composed of multiple materials, differences in the processing characteristics of the composite materials produce residual steps on the surface at composite interfaces. Residual step heights have been reduced to as small as a few nanometers. We investigated using fine abrasives in fixed abrasive lapping to further reduce the residual step height. This requires highly secure, high-density embedding of abrasives on the lapping plate. To this end, we evaluated the surface morphology of the lapping plate after diamond abrasive charging and investigated the embedding mechanism of diamond abrasive charging. The results obtained will assist in determining the direction of future research and development. A prototype charging ring that uses a vibrating system was developed to increase the density of abrasives embedded on the lapping plate. This diamond charging using a vibrating system was able to increase the embedded abrasive density and improve the flatness of the charging plate.

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Hu, Yu Tong, Yong Yong He, and Wei Wang. "The Influence of Surface Texture on Abrasive Wear." Key Engineering Materials 823 (September 2019): 33–40. http://dx.doi.org/10.4028/www.scientific.net/kem.823.33.

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Friction happens everywhere. Abrasives generated in tribological process will result in secondary wear. Abrasive wear is a kind of rather common but harmful wear, which is the main reason for the damage of fifty-percent mechanical components by friction. Surface texturing is an effective method to improve the tribological and lubricating performance of tribo-pairs. In this paper, with different-size diamond particles added into the lubricant and a surface of the tribo-pairs textured by different parameters (diameter and depth) with femtosecond laser, the relationship between the surface texture and the abrasive wear was researched, and the influence of the texture on the abrasive wear was analyzed. The friction experiments were carried out on UMT3. The microstructures were tested and analyzed by SEM, microscope and White Light Interferometer respectively. The experimental results showed that the size of the surface texture, compared with that of abrasives, is the main factor which determines the friction coefficient. As the size of the surface texture is much bigger than that of the abrasives, the texture can accommodate the abrasives efficiently, and thus the friction coefficient is reduced efficiently.

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Wang, Zhan Kui, Ming Hua Pang, Jian Xiu Su, and Jian Guo Yao. "Effect of Different Abrasives on Chemical Mechanical Polishing for Magnesia Alumina Spinel." Key Engineering Materials 866 (October 2020): 115–24. http://dx.doi.org/10.4028/www.scientific.net/kem.866.115.

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In this paper, a series of chemical mechanical polishing (CMP) experiments for magnesia alumina (Mg-Al) spinel were carried out with different abrasives, and the materials removal rate (MRR) and surface quality was evaluated to explore their different effects. The scanning electron microscope (SEM) and laser particle size analyzer were also employed to test the micro-shape and size distribution of abrasives. Then, the mechanism of different effects with different abrasives was analyzed in CMP for Mg-Al spinel. Those experimental results suggest that different subjecting pressure ratios of abrasives to polishing pad with different abrasive are the key factors leading to difference polishing performances in CMP.

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Singh, Palwinder, and Lakhvir Singh. "Experimental Examination on Finishing Characteristics of Aluminum Pipes in Magnetic Abrasive Machining Using SiC Contained Glued Magnetic Abrasives." Trends in Sciences 19, no. 19 (October 4, 2022): 6182. http://dx.doi.org/10.48048/tis.2022.6182.

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With the rapid development in the industry, applications of finished parts are increasing day by day. However, the surface finish of the parts fabricated by conventional processes could not readily meet the requirements of various applications. Therefore, post-processing is needed to further improve the surface quality. Magnetic abrasive machining uses a flexible magnetic abrasive brush to remove material from the workpiece surface at a controllable rate. This cutting tool sticks to the workpiece during finishing operation and exerts a small force on the surface. In magnetic abrasive machining, the cutting tool neither requires compensation nor dressing. In this paper, the internal finishing of aluminum pipes has been investigated in magnetic abrasive machining tests using silicon carbide-based glued magnetic abrasives. For evaluating the performance of these magnetic abrasives, experimental work according to the central composite design technique was carried out to finish the aluminum pipes. The results so obtained were analyzed to study the influence of process parameters like magnetic field strength, speed of workpiece, abrasive mesh size and quantity of magnetic abrasives on percentage improvement in surface finish and material removal rate. The analysis showed that magnetic field strength was the most effective parameter while finishing the aluminum pipe followed by the quantity of magnetic abrasives. The finishing at optimal condition resulted in a surface finish of 0.07 μm. Further, scanning electron microscopy of the surface before and after magnetic abrasive machining was taken to study the improvement in surface finish. HIGHLIGHTS Magnetic abrasive machining (MAM) of aluminum work specimens have been performed by SiC-based magnetic abrasives The central composite design has been used for planning and execution of experiments The surface finish and material removal rate of the machined work specimens have been analysed as a performance measure of MAM process The high value of improvement in surface finish and material removal rate at optimum machining conditions have been observed Scanning electron microscopy (SEM) has been employed to study the surface topography of machined surfaces GRAPHICAL ABSTRACT

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Lyukshin, V. S., Dmitry B. Shatko, and P. A. Strelnikov. "Development of a Technique for the Study of the Coated Abrasive Surface Wear." Solid State Phenomena 313 (January 2021): 66–71. http://dx.doi.org/10.4028/www.scientific.net/ssp.313.66.

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Wear of abrasive tools, including coated abrasives, is an important performance feature. A large number of theoretical works and practical studies are devoted to wear assessment issues. In practice, there are many direct and indirect approaches to measuring wear of an abrasive tool. At the same time, many of them have significant shortcomings such as assessment complexity, high time costs, a significant share of manual labor, low measurement accuracy, the need to use specialized equipment, etc. Based on the foregoing, the development of an effective technique for assessing the coated abrasive wear with the use of information and analytical technologies is very relevant and promising. This work is devoted to the development of an original technique for determining the wear of coated abrasives and studying of the tool surface texture. Some results of studies on the wear of coated abrasives of various grain sizes and manufacturers are presented in the article.

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Lyukshin, V. S., Dmitry B. Shatko, and P. A. Strelnikov. "Development of a Technique for the Study of the Coated Abrasive Surface Wear." Solid State Phenomena 313 (January 2021): 66–71. http://dx.doi.org/10.4028/www.scientific.net/ssp.313.66.

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Wear of abrasive tools, including coated abrasives, is an important performance feature. A large number of theoretical works and practical studies are devoted to wear assessment issues. In practice, there are many direct and indirect approaches to measuring wear of an abrasive tool. At the same time, many of them have significant shortcomings such as assessment complexity, high time costs, a significant share of manual labor, low measurement accuracy, the need to use specialized equipment, etc. Based on the foregoing, the development of an effective technique for assessing the coated abrasive wear with the use of information and analytical technologies is very relevant and promising. This work is devoted to the development of an original technique for determining the wear of coated abrasives and studying of the tool surface texture. Some results of studies on the wear of coated abrasives of various grain sizes and manufacturers are presented in the article.

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Hutchings, Ian. "Uses of abrasives and abrasive tools." Tribology International 26, no. 4 (August 1993): 294–95. http://dx.doi.org/10.1016/0301-679x(93)90012-p.

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36

Yan, Qiu Sheng, Yong Yang, Jia Bin Lu, and Wei Qiang Gao. "Influence of Abrasive on Planarization Polishing with the Tiny-Grinding Wheel Cluster Based on the Magnetorheological Effect." Advanced Materials Research 76-78 (June 2009): 229–34. http://dx.doi.org/10.4028/www.scientific.net/amr.76-78.229.

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Experiments were conducted to polish optical glass with the magnetorheological (MR) effect-based tiny-grinding wheel cluster, and the influences of abrasive material, particle size and content on the material removal rate and surface roughness are investigated. The experimental results indicate that: the higher the hardness of abrasives, the higher the material removal rate, but the abrasives with lower hardness can obtain lower surface roughness. The better polishing quality of the workpiece can be obtained when the particle size of abrasives is similar to the particle size of magnetic particles. Moreover, the content of abrasives has an optimum value, and the material removal rate and the surface quality can not be improved further when the content of abrasives exceeds the optimum value. On the basis of above, the material removal model of the new planarization polishing technique is presented.

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Dutra Golanda, Alexandre, Sandro Galisteu Luiz, Katia C. Gandolpho Candioto, and Carlos Yujiro Shigue. "Preparation and Test of Conventional Composite Abrasives Using Recycled Alumina Grains." Materials Science Forum 874 (October 2016): 199–204. http://dx.doi.org/10.4028/www.scientific.net/msf.874.199.

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In this work we report the preparation and evaluation of the mechanical characteristics of resin-bond composite abrasives using virgin and recycled alumina grains. The composite abrasives were made with phenolic resin as binder and as-received virgin and recycled alumina grains. Three different recycled alumina grains were studied: i) alumina from wood firing resin-bond abrasive tools; ii) alumina from wood firing vitrified-matrix abrasive tools; and iii) ground alumina from vitrified-matrix abrasive tools. The virgin alumina grains were employed in order to compare the mechanical performance of the prepared composite abrasive. The composition of alumina grains, analyzed by X-ray fluorescence spectroscopy revealed the recycled alumina grains have lower alumina content and higher concentration of silica in vitrified-matrix abrasives samples. The sand blast penetration tests have shown lower penetration depth in the virgin and the ground vitrified-matrix grains composites. The impact strength test results revealed its dependence on the alumina and silica content: samples with higher alumina content present the higher impact resistance whereas samples with higher silica content present lower impact strength.

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Lin, Yi, Chiung Fang Huang, Hsin Chung Cheng, and Yung Kang Shen. "A Modified Surface on Titanium Alloy by Micro-Blasting Process." Advanced Materials Research 797 (September 2013): 696–99. http://dx.doi.org/10.4028/www.scientific.net/amr.797.696.

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Hydroxyapatite (HA) coating of hard tissue implants is widely employed for its biocompatible and osteoconductive properties as well as its improved mechanical properties. In this study, a novel micro-blasting process has been used to successfully modify a titanium alloy substrate with a HA treatment using a dopant/abrasive regime. The impact of a series of apatite abrasives, was investigated to determine the effect of abrasive particle size on the surface properties of both micro-blasting (abrasive only) and continuous (HA/abrasive) treatments. The resultant HA treated substrates were compared to substrates treated with abrasive only (micro-blasted) and an untreated Ti. The HA powder, apatite abrasives and the treated substrates were characterized for chemical composition, coating coverage, crystalline and topography. The results show that the surface roughness of the HA blasted modification was affected by the particle size of the apatite abrasives used. This study demonstrates the ability of the continuous process to deposit HA coatings with a range of surface properties onto Ti alloy substrates. The ability of the continuous technology to offer diversity in modifying surface topography offers exciting new prospects in tailoring the properties of medical devices for applications ranging from dental to orthopedic settings.

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Kido, Takanori, Masatake Nagaya, Kenji Kawata, and Tomohisa Kato. "A Novel Grinding Technique for 4H-SiC Single-Crystal Wafers Using Tribo-Catalytic Abrasives." Materials Science Forum 778-780 (February 2014): 754–58. http://dx.doi.org/10.4028/www.scientific.net/msf.778-780.754.

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Diamond abrasives are generally used to machine silicon carbide (SiC) single crystals because of the high hardness of those crystals. Although Chemo-Mechanical Polishing (CMP) employs abrasives softer than the SiC single crystals together with oxidizing agents in order to avoid mechanical damage to the surface of SiC single-crystal wafers, none has reported so far the use of abrasive wheels other than diamond for grinding large SiC single-crystal wafers. The current study revealed that a novel grinding technique using non-diamond abrasives such as ceria (CeO2) can efficiently machine large SiC single-crystal wafers of 100 mm in diameter due hypothetically to the nature of newly named tribo-catalytic abrasives, and is promising to minimize the surface damage prior to the final CMP step.

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Liu, Guangxin, Yugang Zhao, Zhihao Li, Hanlin Yu, Chen Cao, Jianbing Meng, Haiyun Zhang, and Chuang Zhao. "Investigation of Spherical Al2O3 Magnetic Abrasive Prepared by Novel Method for Finishing of the Inner Surface of Cobalt–Chromium Alloy Cardiovascular Stents Tube." Micromachines 14, no. 3 (March 8, 2023): 621. http://dx.doi.org/10.3390/mi14030621.

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In this investigation, spherical Al2O3 magnetic abrasive particles (MAPs) were used to polish the inner surface of ultra-fine long cobalt–chromium alloy cardiovascular stent tubes. The magnetic abrasives were prepared by combining plasma molten metal powder and hard abrasives, and the magnetic abrasives prepared by this new method are characterized by high sphericity, narrow particle size distribution range, long life, and good economic value. Firstly, the spherical Al2O3 magnetic abrasives were prepared by the new method; secondly, the polishing machine for the inner surface of the ultra-fine long cardiovascular stent tubes was developed; finally, the influence laws of spindle speed, magnetic pole speed, MAP filling quantities, the magnetic pole gap on the surface roughness (Ra), and the removal thickness (RT) of tubes were investigated. The results showed that the prepared Al2O3 magnetic abrasives were spherical in shape, and their superficial layer was tightly bound with Al2O3 hard abrasives with sharp cutting; the use of spherical Al2O3 magnetic abrasives could achieve the polishing of the inner surface of ultra-fine cobalt–chromium alloy cardiovascular bracket tubes, and after processing, the inner surface roughness (Ra) of the tubes decreased from 0.337 µm to 0.09 µm and had an RT of 5.106 µm.

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Zhao, Zheng Cai, Jiu Hua Xu, Yu Can Fu, and Zhi Wei Zhang. "Creep Feed Grinding of Ni-Based Superalloy with Micro-Crystalline Ceramic Alumina Wheels." Advanced Materials Research 797 (September 2013): 511–15. http://dx.doi.org/10.4028/www.scientific.net/amr.797.511.

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This article studies the performance of ceramic grinding wheel made of micro-crystalline alumina in the creep feed grinding of nickel-based superalloy Inconel 718. The effects of abrasives and specific pore volume on the performance of wheels are experimentally discussed. Grinding force and temperature were measured and analyzed during grinding tests. The surface roughness was used to describe the quality of ground surfaces. The results indicate that the micro-crystalline alumina SG abrasive wheel with large specific volume has good grinding properties when grinding Inconel 718 in comparison of the wheels with PA abrasives or SG abrasives of small specific pore volume.

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Lv, Ming, Man Dong Zhang, Gang Ya, and P. Xu. "Investigation of Manufacturing Technology in Electroplating CBN on Gear-Honing-Tool." Key Engineering Materials 315-316 (July 2006): 593–96. http://dx.doi.org/10.4028/www.scientific.net/kem.315-316.593.

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In the paper, a new technology combining conventional CBN electroplating and thermal diffusion in vacuum to produce gear-honing-tool for hardened tooth is introduced. The two factors, such as planting CBN abrasives and combination between electroplating layer and matrix that can affect the quality of gear-honing-tool, are investigated. Experiments show that using suspension CBN abrasive electroplating combined with thermal diffusion in vacuum can ensure the quality of planting CBN abrasives of gear-honing-tool and obtain the semi-metallurgy binding layer between CBN abrasives and matrix that withstands the force of honing gears.

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Xu, Xue Feng, H. T. Ma, B. X. Ma, and Wei Peng. "Experimental Study on Parameter Optimization of Silicon Wafer CMP Using Composite Abrasives Slurry." Advanced Materials Research 69-70 (May 2009): 214–18. http://dx.doi.org/10.4028/www.scientific.net/amr.69-70.214.

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In order to increase the material removal rate of silicon wafer, composite abrasives slurry was used in CMP. The mechanism of interaction between silica abrasives and polymer particles was analyzed. Small silica abrasives were seen to attach onto the surface of the polymer particles. Composite abrasives slurry was obtained by adding polymer particles into single abrasive slurry. Three key parameters, the concentration of colloidal silica, the concentration of polymer particle and the speed of polishing, which influence the material removal rate of silicon wafer were analyzed by Taguchi method and the optimal parameters were obtained. Experimental results indicated that the maximum material removed rate of 353nm/min was obtained when optimal craft parameters of 5% colloidal silica, 3% polymer particle, 50rpm plate and carrier rotation speed were selected.

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Ji, Shi Ming, Xi Zeng, and Ming Sheng Jing. "Soft-Consolidation Abrasives Pneumatic Wheel Technology Oriented to Finishing of High-Hardness Free-Form Surface." Key Engineering Materials 523-524 (November 2012): 149–54. http://dx.doi.org/10.4028/www.scientific.net/kem.523-524.149.

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In order to improve the efficiency of high-hardness laser strengthening mold polishing, especially to the free-form surface, a new precision finishing method based on soft-consolidation abrasives pneumatic wheel is brought forward. The pneumatic wheel is constituded by flexible rubber maxtrix, combined with the robbet control. The abrasives group is bond to the rubber matrix by the polymer binder. In the way, compared with those free abrasives used in other polishing method, the soft-consolidation abrasives can get more stable surpport from nearby polymer to form effective cutting. On the other hand, it is unlike the abrasive of rigid grinding wheel because the flexibility of pneumatic wheel can have self-adaptation according to the changes in local curvature and achieve large scale copying contact between tools and work piece. Combined with the lay elastic system theory and Preston equation and coefficients, the mechanics model of polishing is given. The results of experiment shows the Ra of workpiece can be reached to 0.09um and the efficiency of process can be improved three times more than free abrasive machining. It will show its wild prospects in the process of polishing.

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Choosri, Saowapa, Narongrit Sombatsompop, Ekachai Wimolmala, and Sirinthorn Thongsang. "Potential use of fly ash and bagasse ash as secondary abrasives in phenolic composites for eco-friendly brake pads applications." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 233, no. 5 (May 14, 2018): 1296–305. http://dx.doi.org/10.1177/0954407018772240.

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Brake pad is the essential component of disk brake in automotive applications that is made of phenolic-based composites. The alumina and silica are often used as primary abrasives in brake pads. In this study, we investigated the hardness, compressive, friction and wear properties under room temperature and elevated temperatures (100°C and 150°C) of phenolic-based composites containing the natural ashes of fly ash and bagasse ash as secondary abrasives, which ranged from 0 to 12 wt%, for replacing primary abrasives. The results suggested that 4 wt% secondary abrasives was recommended for optimization of the overall properties of the composites. It was found that all composites exhibited the abrasive wear behavior evidenced by wear debris between the counterfaces acting as third-body abrasives. The phenolic-based composites at 100°C and 150°C had higher coefficient of friction and lower wear resistance than those at room temperature. The incorporation of bagasse ash resulted in more compression for a given load than that of fly ash. In summary, the fly ash and bagasse ash, which were natural ashes, showed a potential use as secondary abrasives in the phenolic-based composites for eco-friendly brake pads.

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Zhang, Siqi, Yiran Liu, Weimin Li, Jun Cao, Jiaye Huang, Lei Zhu, and Zijun Guan. "Numerical Analysis of the Effect of Retaining Ring Structure on the Chemical Mechanical Polishing Abrasive Motion State." Materials 16, no. 1 (December 21, 2022): 62. http://dx.doi.org/10.3390/ma16010062.

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Optimizing the retaining ring structure can improve the quality of Chemical Mechanical Polishing (CMP). This study establishes a two-dimensional Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) model, while the model is validated by experiments. The results graphically demonstrate the influence of the retaining ring groove design on the motion of the slurry abrasive particles. The size of the retaining ring groove appears to have a threshold value, above which the abrasives start to have significant distribution in the wafer region. As the groove size continues to increase, the number of abrasives entering the ring increases abruptly and oscillates at specific nodes. The abrasive transfer rate increases with the number of grooves in the early stage but reaches a limit at a certain number of grooves. Meanwhile, the retaining ring position affects the transfer of the abrasives. This study provides a base for optimizing the design of retaining rings.

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Wang, Pei, Lingrui Liang, Zhihong Li, and Yumei Zhu. "Research on Sol-Gel Synthesis of Low-Temperature Na2O-B2O3-SiO2 Vitrified Bonds and Preparation of High-Strength Stacked Abrasives Using the Molding and Crushing Method." Materials 17, no. 8 (April 14, 2024): 1799. http://dx.doi.org/10.3390/ma17081799.

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Currently, the sol-gel technique is employed in the synthesis of high-performance vitrified bonds; however, its application in the fabrication of stacked abrasives has been minimally explored. Furthermore, the methods utilized in the production of abrasive particles for stacked abrasives are technically challenging and incur high costs, which hinders their actual industrial application. Consequently, this study utilizes the sol-gel approach to synthesize a Na2O-B2O3-SiO2 ternary system vitrified bond powder and employs a molding and crushing method, which offers a lower technological barrier and reduced preparation costs, for the production of abrasive particles subsequently fabricating corundum stacked abrasives. Upon setting the binder composition to a molar ratio of n(SiO2):n(B2O3):n(Na2O) = 65:23:12, it was observed that the crystallization within the glass matrix was minimized and the optimal sintering temperature for the synthesized laminate abrasive to be sustained at 820 °C. At the aforementioned temperature, the binder melt is capable of flowing uniformly amongst the abrasive granules, thereby ensuring a robust encapsulation of the particles. The average single particle compressive strength of the prepared corundum stacked abrasive with a grain size of forty mesh can reach the highest of all composition points at 28.56 N and the average single particle compressive strength of the prepared diamond stacked abrasive is 28.14 N.

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Xu, Xue Feng, Bin Shan Zhao, Yu Zhi Yang, Quan Guo, and Wei Peng. "Preparation and its Silica Wafer CMP Performance of Cationic Polyelectrolyte Modified Benzoguanamine Formaldehyde/SiO₂ Composite Abrasives Slurry." Advanced Materials Research 189-193 (February 2011): 4158–62. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.4158.

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In this paper, the adsorption characteristics of cationic polyelectrolyte PDADMAC on BGF particles and Zeta potential of BGF particles have been investigated. A new type of composite abrasive slurry was obtained with cationic polyelectrolyte modified BGF particles and its polishing performance was studied. Experimental results showed that the Zeta potential of the modified BGF particles was changed from negative to positive and the maximum value (+35mv) was obtained when the adsorption saturation was achieved, and the adsorption capacity of SiO2 abrasives on BGF particles was improved significantly as well. The material removal rate was 469nm/min with the modified BGF/ SiO2 composite abrasives slurry containing 5% SiO2 and 3% modified BGF particles, increasing by 47% and 89% than those of the unmodified BGF/SiO2 composite abrasives slurry (319nm/min) and the single silica abrasives slurry (248nm/min), respectively.

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Yang, Shie Chen, Tsuo Fei Mao, Feng Che Tsai, and Hsi Chuan Huang. "Studies of Micro-Hole Burr Improvement for Aluminum Alloy Materials Using Vibrated Abrasive Grinding Machining." Key Engineering Materials 642 (April 2015): 202–6. http://dx.doi.org/10.4028/www.scientific.net/kem.642.202.

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This study investigated the removal improvement of micro burrs of aluminum alloy materials using vibrated abrasive grinding machining. The image processing technology is used to examine and quantify the micro-hole burr profiles. The experimental results show that the micro burr was uniformly removed as the workpiece is fixture with vertical direction. In addition, the burr removal improvements are effectively influenced by the flowing velocity and the vibration energy of abrasive particles. The flowing velocities are dependent on the size and gravity of the abrasives and the vibration energy is determined by the material properties and the hardness of the abrasives.

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Jin, Sui Ying, Yu Jing Jia, and Guang Zhen Cheng. "Design and Research of Double Outlet Abrasives Forming Machine." Applied Mechanics and Materials 201-202 (October 2012): 450–53. http://dx.doi.org/10.4028/www.scientific.net/amm.201-202.450.

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This article provides an abrasive forming machine, the working principle is that: deliver and squeeze out the semi-solid abrasives which after the mixing treatment through the screw, and set up the same cross-sectional shape and size double outlet mould on the export side, Strip abrasives exported from the extrusion cut into granules by pneumatic cutting device, to realize palletizing requirement. Screw conveyor extrusion mechanism, pneumatic cutting device, combined with appropriate travel switch, Electrical control system, to realize the logical relationship of processing requirements, And compared to double exports abrasive machine, Work efficiency increased 1 time.

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Journal articles on the topic 'Abrasives'

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