水润滑下Al_2O_3、Al_2O_3+13%TiO_2等离子喷涂层的摩擦磨损特性  

Tribological Properties of Plasma-sprayed Coating Al_2O_3 and Al_2O_3+13% TiO_2 under Water-lubricated Condition

作　　者：焦素娟[1] 周华[1] 龚国芳[1] 杨华勇[1] 

机构地区：[1]浙江大学流体传动及控制国家重点实验室,杭州310027

出　　处：《润滑与密封》2002年第3期28-29,31,共3页Lubrication Engineering

基　　金：国家自然科学基金(编号:Mo.50005019);兰州固体润滑国家重点实验室开放基金(编号:990)5)

摘　　要：针对纯水液压元件摩擦副实际工况,研究了水润滑状态下Al_2O_3和Al_2O_3+13％TiO_2等离子喷涂试环分别与整体烧结A_2O_3块之间的摩擦磨损特性,考察了摩擦系数及试环磨损量随时间的变化,利用扫描电子显微镜(SEM)观察了磨痕的表面形貌,利用X射线能量色散谱仪分析了磨痕表面的元素组成。研究结果表明:水润滑条件下两种摩擦副的磨损机理主要是脆性断裂、微切削与腐蚀磨损:摩擦副Al_2O_3环/整体烧结Al_2O_3块的摩擦学性能优于Al_2O_3+13%TiO_2环/Al_2O_3块,它们更适合作为纯水液压元件的摩擦副材料。According to the actual working condition of friction pairs in the water hydraulic components, the tribological properties of plasma-sprayed coating Al2O3 and Al2O3 + 13%TiO2 rings against Al2O3 sinter under water-lubricated was investigated. The changing of the friction coefficient and wear rate with time were examined, the WP.II trace were observed by SEM, and elements in the wear trace were analyzed by EDS. The results show that the wear mechanism of the two friction pairs under water-lubricated condition were micro fracture, micro cutting and eroding; The tribological property of Al2O3/Al2O3 was prior to Al2O3 + 13%TiO2/Al2O3, they are more suitable to be the material of water hydraulic components.

关 键 词：等离子喷涂 水润滑 氧化铝 摩擦学特性 二氧化钛 液压元件 液压系统 

分 类 号：TH137[机械工程—机械制造及自动化] TG174.442[金属学及工艺—金属表面处理]