钛铝自润滑材料微观结构及摩擦学性能  

Microstructure and Tribological Properties of Ti-Al Self-lubricating Materials

作　　者：杨丽颖[1] 刘佐民[1] 

机构地区：[1]武汉理工大学摩擦学研究所

出　　处：《武汉理工大学学报》2008年第4期118-120,124,共4页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(50275110);山东省自然基金(Y2007F73)

摘　　要：采用真空热压成型工艺制备了48Ti-48Al-2Nb-2Cr/x(38%CaF2-62%BaF2)自润滑材料(x=5%,10%,15%,20%),通过高温磨损试验分析了其减摩机理和固体润滑剂成膜机理。固体润滑剂在高温下膨胀,渗出基体表面,在摩擦力作用下逐渐铺展,形成固体润滑薄膜,起到抗摩擦磨损的作用。固体润滑剂体积分数增加10%时,已基本成膜,当达到15%时成膜性最好,同时考察了材料的微观结构和机械性能,结果证明固体润滑剂的增加导致了材料孔隙率的增加和机械性能的下降。48Ti-48Al-2Nb-2Cr self-lubricating materials with addition of different weight contents of 38%CaF2-62%BaF2 eutectic solid lubricant(5%,10%,15%,20%, respectively) were fabricated by vacuum hot pressing technology.The wear mechanism and film forming theory were discussed.The self-lubricating materials with 10% solid lubricant began to form solid lubricating film while that of 15% form intact protective film and exhibited good wear-resistance properties.At the same time,porosity of materials accompanied by lig...

关 键 词：TI-AL合金 自润滑 固体润滑剂 微观结构 摩擦磨损 

分 类 号：TH117.22[机械工程—机械设计及理论]