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中文摘要：
采用XP-5型高温摩擦磨损试验机考察了MoSi2／Al2O3配对副在700～1100℃间的摩擦学性能。利用扫描电子显微镜和X射线衍射仪观察与分析了MoSi2的磨损表面与相组成。结果表明：MoSi2／Al2O3摩擦副低于900℃时摩擦因数随温度升高而增加，MoSi2的磨损率较低，氧化与粘着磨损是MoSi2的主要磨损形式；高于900℃时摩擦因数略有下降，但基本维持在0．6～0．8之间，MoSi2的磨损率却显著增加，这是由于塑脆转变特性的影响，MoSi2磨损表面还发生磨粒磨损、变形与断裂，粘着和氧化磨损加剧；偶件Al2O3的磨损形式为粘着磨损。
英文摘要：
The tribological properties of molybdenum dislicide （MoSi2） against Al2O3 in the range of 700～1100℃ were investigated by using an XP-5 type high temperature friction and wear tester. Microphotographs and phase status of the worn surface of MoSi2 were observed by SEM with EDS and X-ray. Results show that friction coefficient of MoSi2/Al2O3 sliding friction couple increases with the increase of temperature when it is less than 900℃ and MoSi2 has low wear rate. The main wear mechanism of MoSie are adhesion and oxidation. However over 900℃, friction coefficient keeps in the range of 0.6～0.8 although it decreases a little with increasing temperature, and wear rate of MoSi2 is clearly raised. This is that because of the ductile brittle transition characteristic of MoSi2, abra sion, plastic deformation and fracture are also found on the worn surface of MoSi2. Adhesion is the main wear mechanism of Al2O3.
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