摘要
无压烧结制备了不同组分的Mo/Al2O3复合材料样品,对样品的磨损行为和磨损机理进行了研究,并用电子探针分析了其磨损形貌.结果表明:Mo/Al2O3复合材料的磨损率随Mo含量的增加呈上升趋势,在30vol.%Mo时出现峰值;摩擦系数随着Mo含量的增加而增大,20vol.%Mo样品的摩擦系数较小;Mo含量不超过60%时,当出现Mo的连续相或者Al2O3的连续相时复合材料表现出较好的耐磨性;Mo含量较低时磨损机理表现为脆性脱落,而Mo含量较高时材料的磨损机理主要为磨粒磨损.
Mo/Al2O3composites with various compositions were sintered under pressureless conditions. The wear behavior and wear mechanism of Mo/Al2O3 composites were studied. Hesults indicated that the wear rates initially increased with the increasing volume fraction of Mo. At 30% to 60% , the wear rates decreased as the volume fraction of Mo increased. A marked increment in wear rate can be found as the volume fraetion increased from 60% to 70%. At 10% and 20% , the friction coefficients were low. The composites exhibited good wear resistance when the volume fraction of Mo was higher than 60% and Mo or Al2O3 was continous. The wear mechanisms were brittle break off for composites with low Mo fraction, and abrasive wear for composites with high Mo fraction.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2009年第5期442-446,共5页
Tribology
基金
山东省自然科学基金资助项目(Y2007F32)
关键词
钼
氧化铝
磨损率
耐磨性
磨损机理
molybdenum, alumina, wear rate, wear resistance, wear mechanisms
