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中文摘要：
采用高温自蔓延合成了MoSi2粉末,经冷压和高温真空烧结成试样。在XP-5型高温摩擦磨损试验机上,考察了MoSi2与Al2O3陶瓷在1 000℃对摩时的摩擦磨损特性。通过带微探针的扫描电子显微镜（SEM）观察与分析了试样表面的磨损形貌及成分组成,并讨论了其磨损机理。结果表明,MoSi2的高温磨损过程存在跑合、过渡期和稳定磨损3个阶段,小于50 N时该材料具有较好的耐磨性;虽然粘着磨损普遍存在,但随着载荷的增大,MoSi2的磨损机理依次还表现出研磨、塑性变形与疲劳断裂。
英文摘要：
MoSi2 powder was prepared firstly by SHS, and pressed at room-temperature and then vacuum sintered at high tempe-rature. The tribological properties of intermetallic Molybdenum Dislicide （ MoSi2 ） against Al2O3 were investigated by using an XP -5 type High Temperature Friction and Wear Tester at 1 000 ℃. The worn surface microphotograph of MoSi2 was observed by SEM with EDS and wear mechanism was studied. The wearing process of MoSi2 at high temperature included three stages ： running in, interim and steady period. MoSi2 has better wear-resistance under the load lower than 50 N. The adhesion wear exisit widely, however, with the load increasing, the wear mechanisms of MoSi2 are changed from abrasion, plastic deformation to fatigue fracture in turn.
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