晶粒尺寸对纳米晶钴摩擦磨损性能的影响  

Effect of Grain Size on the Friction and Wear Properties of Electrodeposited Nanocrystalline Cobalt

作　　者：王立平[1] 高燕[1] 薛群基[1] 刘惠文[1] 徐洮[1] 

机构地区：[1]中国科学院兰州化学物理研究所固体润滑国家重点实验室,甘肃兰州730000

出　　处：《表面技术》2005年第1期31-33,共3页Surface Technology

基　　金：国家863项目(2003AA305670)

摘　　要：　采用脉冲电沉积法制备了不同晶粒尺寸的纳米晶钴镀层,考察了晶粒尺寸对纳米晶钴硬度和摩擦磨损性能的影响。结果表明:随着晶粒尺寸的减小,钴镀层的硬度显著升高,符合经典的Hall Petch效应;而纳米晶钴的抗磨性并没有随着晶粒的减小而显著增加,同时其摩擦系数随着晶粒的减小而略有增加。The nanocrystalline cobalt deposits with different grain size were produced by pulse electrodeposition. The effects of grain size on the hardness and tribological properties of nanocrystalline cobalt were investigated. Results show that hardness of cobalt deposits increases with the decrease of grain size, the relation between hardness and grain size is in good agreement with Hall-Petch hardening effect. The nanocrystalline cobalt doesn't show significantly improved wear resistance with the reduction of grain size, and the friction coefficient of cobalt deposits increases slightly with the decrease of grain size.

关 键 词：纳米晶钴 脉冲电沉积 硬度 摩擦磨损 

分 类 号：TQ153.1[化学工程—电化学工业]