坡缕石/铜复合纳米粉体对HT200摩擦副的摩擦学性能  

Tribological Effects of Palygorskite/Copper Nanocomposites as Lubricating Oil Additive on HT200 Tribo-pair

作　　者：吴雪梅[1] 周元康[1] 杨绿[1] 

机构地区：[1]贵州大学机械工程学院,贵州贵阳550025

出　　处：《材料科学与工程学报》2012年第2期222-226,共5页Journal of Materials Science and Engineering

基　　金：贵大自青基合字(2010)020;贵大自青基合字(2009)035号资助项目

摘　　要：用共混法制备1∶1的坡缕石/铜复合纳米粉体,经表面修饰后按质量比2%添加到150N基础油中,制备出含复合纳米材料添加剂的润滑油体系。用MMU-10G摩擦磨损试验机测试该润滑油添加剂对HT200对磨试样的摩擦学性能,并用高精度电子天平测定试件的失重量以评定其耐磨性能。用扫描电镜SEM、EDX等分析了摩擦磨损试验后表面成分与形貌的变化,并分析了摩擦学性能变化的机理。结果表明:制备的坡缕石/铜复合纳米粉体在基础油中分散性良好,颗粒大小不超过200nm,能明显提高摩擦副的减摩抗磨性能,平均摩擦因数下降19.1%,总磨损量下降44%,试件表面生成了含坡缕石特征元素和铜元素的自修复膜层,这是纳米坡缕石和纳米铜粒子共同作用的结果。Palygorskite/copper nanocomposites（P/Cu） were prepared by mechanical stirring.The lubricating oils containing 2wt% of nanocomposites were prepared.The tribological behaviors of P/Cu were observed on the MMU-10G abrasive-wear tester.To characterize the wear loss with time,the tribological samples were weighed with a high precision electronic balance.To understand the effect of P/Cu additives,transmission electron microscopy（TEM）,scanning electron microscope（SEM） and energy dispersive X-ray（EDX） spectroscopy were used.Experimental results show that the P/Cu have fine dispersing and their particles size is less than 200nm.The P/Cu show significant anti-wear and certain friction-reduction performance.The average friction coefficient of P/Cu decreases about 19.1% and the wear volume loss decreases about 44% compared with 150N base oil.Characteristic elements of palygorskite and copper are found in the self-repairing film,which are the interaction results of nano-palygorskite and nano-copper.

关 键 词：纳米坡缕石 纳米铜 摩擦磨损性能 自修复膜 

分 类 号：TB383[一般工业技术—材料科学与工程] TB31