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3823 |
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Microstructure and wear resistance of TiC coating
fabricated by low pressure plasma spray
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Yaran Niu* / Shanghai Institute of Ceramics, Chinese Academic of Science, China Xiaoqian Guo/ Shanghai Institute of Ceramics, Chinese Academy of Sciences, China Jun Zhao/ Shanghai Institute of Ceramics, Chinese Academy of Sciences, China Xuebin Zheng/ Shanghai Institute of Ceramics, Chinese Academy of Sciences, China Chuanxian Ding/ Shanghai Institute of Ceramics, Chinese Academy of Sciences, China |
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Titanium carbide (TiC) has high melting point, high hardness and good chemical stability. In this work low pressure plasma spray (LPPS) technique was applied to fabricate TiC coating. Its microstructure was characterized and the tribological property of the coating was studied. The results show that the coating was mainly composed of cubic TiC phase, which had typical lamellar microstructure. Microcracks and miropores were found in the TiC coating. The porosity of the coating was about 8.7 %. The wear tests was carried out on a ball-on-disc wear testing machine with an applied load of 50 N and a sliding speed of 0.5 m/s, using WC-Co counterballs. The friction coefficient and wear rate of the TiC coating were about 0.2 and 2.4 × 10-15 m3/N"m, respectively. The wear failure mechanism of the TiC coating was found to be fatigue flaking off and particles pulling out. |