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 ...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.展开更多
基金Project(50405041) supported by the National Natural Science Foundation of ChinaProject(2007) supported by the Opening Research Foundation State Key Laboratory of Powder Metallurgy of China
文摘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.