Effect of La2O3 on the wear behavior of MoSi2 at high temperature

• Published in: Journal of rare earths Vol. 29; no. 4; pp. 370 - 373
• Main Author: 张厚安 古思勇 谢能平
• Format: Journal Article
• Language: English
• Published: Institute of Material Preparation and Applied Technology, Xiamen University of Technology, Xiamen 361024, China%College of Electromechanical Engineering,Hunan University of Science and Technology, Xiangtan 411201, China 01.04.2011
• Subjects: La2O3; MoSi2; 二硅化钼; 复合氧化; 扫描电子显微镜; 摩擦磨损试验机; 磨损行为; wear; MoSi2 matrix composite; La2O3; SiC; high temperature; rare earths
• ISSN: 1002-0721; 2509-4963
• DOI: 10.1016/S1002-0721(10)60462-0

Wear behaviors of MoSi2 doped with La2O3 against SiC under different loads at 1000 oC in air were investigated by using an XP-5 type high temperature friction and wear tester. The worn surfaces and phases of the samples were analyzed by scanning electron microscopy （SEM） and X-ray diffraction, respectively. Results showed that the addition of La2O3 could obviously improve wear resistance of MoSi2. Because of the formation of MoO3 phase on the worn surface, La2O3/MoSi2 composite mainly exhibited oxidation and abrasive wear, which was different from the wear form of MoSi2 such as adhesion, oxidation and abrasion.