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中文摘要：
在XP-5型高温摩擦磨损试验机上考察了MoSi2/SiC配对副在1000℃不同载荷下的摩擦磨损性能,并用SEM扫描电镜对MoSi2和SiC的磨损表面进行了观察,用X射线分析了MoSi2的磨损表面相组成。结果表明：MoSi2/SiC摩擦副在1000℃高温滑动时,随载荷增大摩擦系数逐渐减小;40 N时MoSi2的磨损率达到极大值;随载荷的增大,MoSi2的主要磨损机制依次表现为粘着、研磨、疲劳断裂和氧化磨损等形式。20-50 N时,SiC出现磨损增重现象,归因于氧化增重作用高于磨损失重作用。
英文摘要：
The frictional properties of molybdenum disilicide （MoSi2） against SiC under different loads at 1000 ℃ were investigated with XP-5 type High Temperature Friction and Wear Tester. Microphotographs of the worn surface and phase status of MoSi2 were observed and analyzed by means of SEM with EDS and X-ray diffraction method. The results showed that friction coefficient of sliding was reduced gradually with the increase of load for the friction couole of MoSi2/SiC at 1000 ℃. Wear rate of MoSi2 was the ultimate when load was 40 N. With the increase of load, the mechanism of MoSi2 wear changed from the form of adhesion, abrasion to fatigue fracture and oxidation in sequence. When the load was in the range of 20 N to 50 N, the worn weight gain of SiC was increased, since the influence of oxidation on the weight gain was more obvious than that of wear.
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