自润滑Al_2O_3/TiC/CaF_2复合陶瓷材料摩擦特性  

Wear Properties of Self-lubricating Al_2O_3/TiC/CaF_2 Ceramic Composites

作　　者：杨学锋[1] 宋培龙[1] 王守仁[1] 杨丽颖[1] 王砚军[1] 

机构地区：[1]济南大学机械工程学院,济南250022

出　　处：《人工晶体学报》2012年第6期1741-1746,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金青年项目(51005100);中国博士后基金(二等)(20110491572);山东省科技发展计划(2012GGX10324)

摘　　要：为了探索自润滑陶瓷材料的开发及应用,采用冷压烧结工艺制备Al2O3/TiC/CaF2自润滑复合陶瓷材料。在摩擦磨损实验机上对其进行摩擦磨损实验,并对其摩擦磨损行为及自润滑效应进行分析。结果表明:在实验过程中,Al2O3/TiC/CaF2复合陶瓷材料物理机械性能优于同条件下制备的Al2O3/TiC复合陶瓷材料,且具有较低的摩擦因数和磨损率,其减摩抗磨效果明显,具有一定的自润滑效应,其减摩抗磨机理为摩擦驱动下CaF2存在于摩擦副表面,形成减摩抗磨层,在表面形成一层平整、光滑的自润滑层,增加摩擦表面实际接触面积,起到自润滑效应。In order to develop and apply self-lubricating ceramic composites,the Al2O3/TiC/CaF2 self-lubricating ceramic composite were prepared by cold-press sintering.The friction and wear experiments were carried on wear and tear machine.The mechanism of wear behavior and self-lubricating effect is analyzed by scanning electron microscope and energy dispersion spectrum.The results show that the Al2O3/TiC/CaF2 ceramic composite have better mechanism properties than Al2O3/TiC ceramic composite which was prepared at the same conditions.The Al2O3/TiC/CaF2 ceramic composite has lower friction coefficient and lower wear rate than Al2O3/TiC composite.It is evidence that Al2O3/TiC/CaF2 ceramic composite have good wear resistance properties and some self-lubricating effect.The mechanism of wear resistance and friction reducing is the smoother films which shaped because the CaF2 particulate absorbed on friction pairs and brought self-lubricating films.The real touch area of friction surface is increase and some smooth self-lubricating films are formed for reducing more destroy of worn surfaces.

关 键 词：自润滑 减摩抗磨 摩擦特性 复合陶瓷 

分 类 号：TQ174.758[化学工程—陶瓷工业]