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莫来石纤维增强铝基合金复合材料在干滑动条件下的摩擦磨损特性 被引量:9

Friction and Wear Properties of Mullite Fiber Reinforced Cast AluminiumSilicon Alloy on Dry Sliding Friction
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摘要 在MM-200型磨损试验机上,研究了以挤压铸造法制备的莫来石(3Al2O32SiO2)纤维增强的ZL109合金复合材料在干滑动条件下的摩擦磨损特性.结果表明:在给定的试验条件下,这种复合材料与45#钢对摩时的摩擦因数是随载荷的升高而减小,当载荷高于30N时,摩擦因数基本稳定为0.34;在载荷低于40N的情况下,复合材料的耐磨性比ZL109合金的好,磨损主要是粘着磨损和磨粒磨损,而在载荷高于40N的条件下,复合材料的耐磨性反而比ZL109合金的差,此时发生的除粘着磨损和磨粒磨损外,更主要的是层离剥落.此外,还通过对复合材料磨损表面、磨屑和亚表层的扫描电子显微镜分析,建立了高载荷条件下复合材料层离剥落过程的模型示意图. Friction and wear properties of 3Al2O3·2SiO2fZL109 composite fabricated by squeeze casting on the dry sliding friction were investigated. The results showed that under the given test conditions, the friction factor decreases with the increasing of load when the composite is frictionated with 45# steel. The friction factor can stabilize at 0.34 when the load higher than 30 N. The wear resistance of composite is better than that of ZL109 alloy when load is lower than 40 N, the adhesion and abrasive wear is the main wear mechanism, whereas the wear resistance of composite is lower than that of ZL109 alloy when load above 40 N, the stripping and peeling off is the main wear mechanism. The simple model of the delamination of composite at high load was established by means of SEM photographs of worn surface, debris and subsurface.
出处 《摩擦学学报》 EI CAS CSCD 北大核心 1997年第2期140-145,共6页 Tribology
基金 国家自然科学基金
关键词 莫来石纤维 铝基 复合材料 滑动摩擦 磨损机理 mullite fiber composite sliding friction wear mechanism
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