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A Study on the Effect of Coke Particle Size and Applied Compacting Pressure on the Physical Properties of Electrographite Brushes | ||
| Iranian Journal of Materials Forming | ||
| دوره 10، شماره 2، تیر 2023، صفحه 12-21 اصل مقاله (1.71 M) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22099/ijmf.2023.47593.1262 | ||
| نویسندگان | ||
| H. Ebrahimi؛ M.H. Paydar* | ||
| Department of Materials Science and Engineering, School of Engineering, Shiraz University, Shiraz, Iran | ||
| چکیده | ||
| In this study, electrographite brushes were produced from petroleum coke and coal tar pitch via the powder metallurgy method, and the effect of petroleum coke particle size and applied compacting pressure were investigated on the green density, hardness and, the graphitization process. The results showed that an increase in the density of the raw sample and the hardness of the final product occurred due to a decrease in particle size by increasing the milling time up to 4 h. Additionally, an increase in both density and hardness of the sample was observed as the applied compacting pressure was increased up to 150 MPa, where no alteration in the obtained values was observed with a further increase in the applied pressure. As a result of increasing the milling time and applying the optimum pressure, the density of the raw sample increased to 1.41 g/cm³ and the hardness increased to 81 Shore C. The results also proved that the average particle size of the used petroleum coke and the applied compacting pressure do not have an influence on the graphitization process. | ||
| کلیدواژهها | ||
| Electrographite؛ Powder metallurgy؛ Graphitization؛ Petroleum coke | ||
| مراجع | ||
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[1] K. Groth, F. Heidenfelder, R. Holinski, Advancements of tribological performance of carbon brushes in electrical motors, Industrial Lubrication and Tribology, 53(1) (2001) 5-10.
[2] H. Jäger, W. Frohs, Industrial carbon and graphite materials: raw materials, production and applications, John Wiley & Sons, Germany, 2021, pp.107-273.
[3] N.P. Bansal, J. Lamon, Ceramic matrix composites: materials, modeling and technology, John Wiley & Sons, New Jersey, 2015, pp. 87-140.
[4] J.D. Koenitzer, Brush-holders and the performance of carbon brushes, Electrical Apparatus Service Association. Inc., Tech Note, 2003.
[5] S. Ragan, H. Marsh, Science and technology of graphite manufacture, Journal of Materials Science, 18 (1983) 3161-3176.
[6] Mersen Company, Carbon brushes for motors and generators, Mersen 1605, Mersen’s Technical Data Sheets, available from www.mersen.com.
[7] J.B. Lunsfoed, Carbon brushes the troblem of replacements and the necessity for standardization, Journal of the American Society for Naval Engineers, 40(1) (1928) 65-89.
[8] H.O. Pierson, Handbook of carbon, graphite, diamond, and fullerenes: properties, processing and applications, Noyes, Park Ridge, 1993, pp.399.
[9] G. Savage, Carbon-carbon composites, Springer Netherlands, Dordrecht, 1993.
[10] U. Suriyapraphadilok, Characterization of coal- and petroleum derived binder pitches and the interaction of pitch/coke mixtures in pre-baked carbon anodes, The Pennsylvania State University, 2008.
[11] M. Granda, J.W. Patrick, A. Walker, E. Casal, J. Bermeijo, R. Menbndez, Densification of unidirectional C/C composites by melted pitch impregnation, Carbon, 36(7-8) (1998) 943-952.
[12] D.W. Mckee, R.H. Savage, Chemical factors in carbon brush wear, Wear, 22(2) (1972) 193-214.
[13] S.V. Leleka, Generalized mathematical model of physical fields of technological redistributions of manufacturing electrographite products, Energy Technologies & Resource Saving, 2 (2021) 28-43.
[14] S. Im Ji, C.W. Lee, H.P. Halim, Preparation of needle coke from petroleum by-products, Carbon Letters, 14(3) (2013) 152-161.
[15] S.M. Lee, D.S. Kang, J.S. Roh, Bulk graphite: materials and manufacturing process, Carbon Letters, 16(3) (2015) 135-146.
[16] W.P. Eatherly, E.L. Piper, Manufacture, In: Nuclear Graphite, Elsevier Science, 2013, pp. 21-51.
[17] C.G. Blanco, A. Dominguez, M.J. Lglesias, M.D. Guillh, Relation between solubility of coal tar pitches and composition of their volatile fraction, Fuel, 73(4) (1994) 510-514.
[18] D.D.L. Chung, Electrical applications of carbon materials, Journal of Materials Science, 39 (2004) 2645-2661.
[19] S. Huang, H. Guo, X. Li, Z. Wang, L. Gan, J. Wang, W. Xiao, Carbonization and graphitization of pitch applied for anode materials of high-power lithium-ion batteries, Journal of Solid-State Electrochemistry, 17(5) (2013) 1401-1408.
[20] R. Gadiou, A. Didion, S.E. Saadallah, M. Couzi, J.N. Rouzaud, P. Delhaes, C. Vix-Guterl, Graphitization of carbons synthesized in a confined geometry, Carbon, 44(15) (2006) 3348-3352.
[21] T. Kim, J. Lee, K.H. Lee, Full graphitization of amorphous carbon by microwave heating, RSC Advances, 6(29) (2016) 24667-24674.
[22] O.Y. Urazlina, V.I. Churilin, E.N. Panov, G.N. Vasil’chenko, A.Y. Karvatskii, Efficiency analysis of the use of highly graphitized bottom blocks in 156-160 kA aluminum electrolyzers, Refractories and Industrial Ceramics, 46(2) (2005) 93-97.
[23] K. Sawa, Brush Materials, In Encyclopedia of Tribology, Springer, Boston, MA. Science, Business Media New York, 2013, pp. 284-288.
[24] J.K. Lancaster, The relationship between the wear of carbon brush materials and their elastic moduli, British Journal of Applied Physics, 14(8) (1963) 497.
[25] DIN IEC 60413, Test procedures for determining physical properties of brush materials used for electrical machines, 1972.
[26] A. Vlahov, XRD graphitization degrees: a review of the published data and new calculations, correlations, and applications, Geologica Balcanica, 50(1) (2021) 11-35. | ||
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