Effect of WS_2 addition on electrical sliding wear behaviors of Cu-graphite-WS_2 composites  

二硫化钨含量对铜-石墨-二硫化钨复合材料电滑动磨损性能的影响（英文）

作　　者：钱刚[1] 凤仪[1] 陈阳明[1] 莫飞[1] 王雨晴[1] 刘文宏[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,合肥230009

出　　处：《Transactions of Nonferrous Metals Society of China》2015年第6期1986-1994,共9页中国有色金属学报（英文版）

基　　金：Projects(91026018;60979017) supported by the National Natural Science Foundation of China;Project(20110111110015) supported by the Doctoral Fund of Ministry of Education of China

摘　　要：Four kinds of Cu-based composites with different mass ratios of graphite and WS2 as lubricants were fabricated by hot-pressing method. Electrical sliding wear behaviors of the composites were investigated using a block-on-ring tribometer rubbing against Cu-5%Ag alloy ring. The results demonstrated that 800 ~C was the optimum sintering temperature for Cu-graphite-WS2 dual-lubricant composites to obtain the best comprehensive properties of mechanical strength and lubrication performance. Contact voltage drops of the Cu-based composites increased with increasing the mass ratio of WS2 to graphite. The Cu-based composite with 20% graphite and 10% WS2 showed the best wear resistance due to the excellent synergetic lubricating effect of graphite and WS2. The reasonable addition of WS2 into the Cu-graphite composite can remarkably improve the wear resistance without much rise of electrical energy loss which provides a novel principle of designing suitable sliding electrical contact materials for industrial applications.采用粉末冶金热压法制备了4种以石墨和二硫化钨为润滑剂的铜基复合材料,并采用环-块式磨损机对复合材料与Cu-5%银合金环对磨时的电滑动磨损性能进行测试。结果表明,铜-石墨-二硫化钨双润滑剂复合材料在800°C烧结时可以在保证其良好的润滑性能的同时获得较优的力学性能。随着二硫化钨与石墨质量比的增加,复合材料的接触电压降增加,铜-20%石墨-10%二硫化钨复合材料在电磨损过程中显示出最佳的抗磨性能,这主要是由于石墨和二硫化钨之间优异的协同润滑作用。在铜-石墨复合材料中添加适量的二硫化钨可以在电能损耗增加不多的同时显著提高其磨损抗力,为制备高性能滑动电接触材料提供了一种新颖的设计思路。

关 键 词：Cu-based composites GRAPHITE WS2 synergetie lubrication wear rate contact voltage drop 

分 类 号：TB333[一般工业技术—材料科学与工程]