稀土对等离子喷涂镍-碳化钛陶瓷涂层摩擦学性能的影响  

Study on the Friction and Wear Characteristics of Plasma Sprayed Ni-TiC Coatings with or without Rare Earth Additive

作　　者：戴振东[1] 文明才 李祥明[1] 姜澄宇[1] 薛同博 朱自冰 刘贵龄 

机构地区：[1]南京航空航天大学机电工程学院,江苏南京210016 [2]张家界航空工业学校,湖南张家界416600 [3]航空工业总公司608所,湖南株洲412002

出　　处：《摩擦学学报》2000年第3期175-178,共4页Tribology

基　　金：中科院兰州化物所固体润滑国家重点实验室开放课题! ( 970 7);江苏省自然科学基金项目! ( P970 4 );"九五"国防预研计划课题! ( KT

摘　　要：用销盘摩擦磨损试验机模拟齿面的相对滑动 ,经测定摩擦系数和上下试样的磨损体积损失、涂层的金相分析、磨痕形貌及成分的扫描电子显微镜观察及分析 ,研究硅铁稀土混合物对高能等离子喷涂金属陶瓷涂层摩擦学特性的影响 .试验结果表明 :添加稀土使涂层致密性提高、摩擦系数有所降低、上下试样的磨损体积损失分别减小 33%和74%,摩擦副表面温升降低 .研究表明添加稀土有助于在涂层表面形成连续的氧化膜 ,从而防止胶合并提高耐磨性 .The effect of rare earth ferrosilicon on the friction and wear behaviors of plasma sprayed Ni TiC coating on 12Cr2Ni4A substrate was investigated by means of friction and wear testing, metallographic and scanning electron microscopic observations. The friction and wear testing of the coating sliding against a high speed steel was conducted on a pin on disk tester by simulating the sliding between gear tooth. As the results, the plasma sprayed Ni TiC coatings doped with rare earth ferrosilicon registers lower friction coefficient and is of high compactness as compared with that of coatings without rare earth ferrosilicon. At the same time, the former has considerably higher wear resistance than the latter and records a lower wear volume loss of the counterpart pin as well. It was supposed that a continuous and relatively thinker oxide film was formed on the surface of the coatings containing rare earth ferrosilicon, which helps to keep the frictional pair surfaces off adhesion and contact, subsequently improve the friction reduction behavior and increase the wear resistance of the coatings.

关 键 词：稀土 等离子喷涂 陶瓷涂层 摩擦学性能 

分 类 号：TG174.442[金属学及工艺—金属表面处理]