Effects of Mo addition on tribological performance of plasma-sprayed Ti-Si-C coatings

被引：17
作者：
Jiao, Qi [1 ]
Guo, Fangfang [1 ]
Li, Chao [1 ]
Zheng, Gaofeng [1 ]
He, Jining [1 ]
Zhao, Hongjian [1 ]
Qin, Yanfang [2 ]
Yin, Fuxing [1 ]
机构：
[1] Hebei Univ Technol, Sch Mat Sci & Engn, Res Inst Energy Equipment Mat, Tianjin Key Lab Mat Laminating Fabricat & Interfa, Tianjin 300132, Peoples R China
[2] Suzhou Univ Sci & Technol, Coll Mech Engn, Suzhou 215000, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2020年 / 46卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Ti-Si-C-Mo; Plasma spraying; Microstructure; Tribological properties; COMPOSITE COATINGS; MECHANICAL-PROPERTIES; THIN-FILMS; MICROSTRUCTURE; ZR;
D O I：
10.1016/j.ceramint.2020.02.064
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Ti-Si-C-Mo composite coatings were fabricated by plasma spraying using Ti, Si, graphite and Mo powders. The effect of Mo on microstructure and tribological performance of the Ti-Si-C coatings were investigated. The results showed that the Ti-Si-C coating consisted of TiC, Ti3SiC2, Ti5Si3, and residual graphite. The Ti-Si-C-Mo coatings consisted of TiC, Ti3SiC2, Ti5Si3, residual graphite, Mo and Mo5Si3 phases. With increasing Mo contents, the fractions of Mo and Mo5Si3 phases increased, and the fractions of Ti3SiC2 and Ti5Si3 phases decreased. All the coatings existed a typical lamellar structure. The addition of Mo enhanced the hardness and fracture toughness of Ti-Si-C coating by 16% and 52%, respectively. The coating porosity decreased by 57.6%. The wear resistance of the Ti-Si-C coating was also improved and the mass loss decreased by 83%. The wear mechanism of the Ti-Si-C-Mo coatings was the combination of abrasive wear, adhesive wear, and tribo-oxidation wear.
引用
收藏
页码：12948 / 12954
页数：7
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