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Fabrication of SiC/diamond composite coatings by electrophoretic deposition and chemical vapor deposition

Research paper by Shengjie Yu, Zhaofeng Chen, Yang Wang, Ruiying Luo, Tengzhou Xu, Ying Pan, Jiahao Liao

Indexed on: 19 Mar '17Published on: 15 Mar '17Published in: International Journal of Applied Ceramic Technology



Abstract

In this research, SiC/diamond composite coatings were fabricated by a novel procedure that consisted of the electrophoretic deposition (EPD) of diamond particles onto graphite substrates followed by chemical vapor deposition (CVD) of SiC. Various concentrations of MgCl2 were employed to increase the deposition rate and uniformity of the deposits during the EPD process by giving a positive charge to diamond particles. The CVD of SiC was found to have a tightly connected diamond-graphite interface and spherical texture. With higher weight fraction of diamond particles deposits, the wear of steel ball increased, while the wear of SiC coating decreased.