High-temperature wear behaviors of MoSi2 under different loads

• Published in: Transactions of Nonferrous Metals Society of China Vol. 17; no. A01; pp. 60 - 63
• Main Author: 胡小平 谭伟成 唐思文 张厚安 黄之初
• Format: Journal Article
• Language: English
• Published: 01.11.2007
• Subjects: 二硅化钼; 摩擦学特性; 耐磨机械装置
• ISSN: 1003-6326

MoSi2 was prepared by SHS, pressed at room-temperature and then vacuum sintered at 1 500 ℃ for 1 h. The tribological properties of MoSi2 against Al2O3 were investigated by using an XP-5 type High Temperature Friction and Wear Tester. Micrographs and phases of the worn surface of MoSi2 were observed by SEM with EDS and X-ray diffraction. The results show that the wearing process of MoSi2 at high temperature exists three stages： running-in, interim and steady periods. MoSi2 exhibits preferable wear resistance when the load is lower than 50 N. Adhesion and oxidation wear exists widely at elevated temperature; however besides these, with increasing the load, the main wear mechanisms of MoSi2 could be changed from adhesion, plastic forming to fatigue fracture in turn.