Vacuum current-carrying tribological behavior of MoS2-Ti films with different conductivities  

作　　者：Lu-Lu Pei Peng-Fei Ju Li Ji Hong-Xuan Li Xiao-Hong Liu Hui-Di Zhou Jian-Min Chen 裴露露;鞠鹏飞;吉利;李红轩;刘晓红;周惠娣;陈建敏(Key Laboratory of Science and Technology on Wear and Protection of Materials,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;Shanghai Aerospace Equipment Manufacture,Shanghai 200245,China)

机构地区：[1]Key Laboratory of Science and Technology on Wear and Protection of Materials,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China [2]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China [3]Shanghai Aerospace Equipment Manufacture,Shanghai 200245,China

出　　处：《Chinese Physics B》2022年第6期563-571,共9页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.51775537);Youth Innovation Promotion Association of Chinese Academy of Sciences(Grant No.Y202084)。

摘　　要：Current-carrying sliding is widely applied in aerospace equipment,but it is limited by the poor lubricity of the present materials and the unclear tribological mechanism.This study demonstrated the potential of MoS_(2)-based materials with excellent lubricity as space sliding electrical contact materials by doping Ti to improve its conductivity.The tribological behavior of MoS_(2)-Ti films under current-carrying sliding in vacuum was studied by establishing a simulation evaluating device.Moreover,the noncurrent-carrying sliding and static current-carrying experiments in vacuum were carried out for comparison to understand the tribological mechanism.In addition to mechanical wear,the current-induced arc erosion and thermal effect take important roles in accelerating the wear.Arc erosion is caused by the accumulation of electric charge,which is related to the conductivity of the film.While the current-thermal effect softens the film,causing strong adhesive wear,and good conductivity and the large contact area are beneficial for minimizing the thermal effect.So the moderate hardness and good conductivity of MoS_(2)-Ti film contribute to its excellent current-carrying tribological behavior in vacuum,showing a significant advantage compared with the traditional ones.

关 键 词：MoS2-Ti films CONDUCTIVITY current-carrying tribological behavior VACUUM 

分 类 号：TB383.2[一般工业技术—材料科学与工程]