载荷对原位无压烧结MoSi_2基复合材料磨损性能的影响  

Effect of Load on Wear Properties of SiC-WSi_2-MoSi_2 Composite by In-situ Pressureless Sintering

作　　者：陈芳[1] 侯周福[1] 方亨农[1] 唐果宁[1] 许剑光[1] 

机构地区：[1]湖南科技大学先进材料制备与应用技术研究所,湖南湘潭411201

出　　处：《矿冶工程》2010年第4期95-97,共3页Mining and Metallurgical Engineering

基　　金：湖南省自然科学基金(07JJ4017);湖南科技大学2008年研究生创新基金项目(S080104)

摘　　要：通过原位烧结的方法成功制备出SiC-WSi2-MoSi2复合材料,并在XP-5型高温摩擦磨损试验机上考察了SiC-WSi2-MoSi2复合材料与Al2O3陶瓷对磨时的摩擦磨损特性。采用带微探针的扫描电子显微镜(SEM)观察与分析了SiC-WSi2-MoSi2复合材料的磨损表面形貌及成分组成,并讨论了其磨损机理。实验结果表明:复合材料的磨损过程可分为3个阶段:跑合阶段、过渡期和稳定磨损;MoSi2基复合材料的磨损机理随着载荷变化而变化,依次表现为氧化、粘着、研磨和疲劳磨损。Al2O3的磨损机制为粘着和疲劳磨损。SiC-WSi2-MoSi2 composite was successfully prepared by in-situ pressureless sintering.The tribological properties of SiC-WSi2-MoSi2 composite against Al2O3 were investigated by using an XP-5 type high-temperature friction and wear tester.The worn surface morphology and composition of the composite and Al2O3 were observed and analyzed by scanning electron microscope（SEM） with microprobe.In addition,the wear mechanism was also discussed.The results show that the wearing process of the composite materials can be divided into three stages： running in,transition and stable wear.The wear mechanism of MoSi2-based composites changes with the variation of the load,behaving as oxidation,adhesion,grinding and fatigue wear in turn.The wear mechanism of Al2O3 is adhesion and fatigue wear.

关 键 词：MOSI2基复合材料 原位无压烧结 磨损机理 

分 类 号：TG148[一般工业技术—材料科学与工程] TH117.1[金属学及工艺—金属材料]