Influence of adding carbon nanotubes and graphite to Ag-MoS_2 composites on the electrical sliding wear properties  

作　　者：Shu LI Yi FENG Xiting YANG 

机构地区：[1]~ v Department of Material Science and Engineering, Hefei University of Technology, Hefei 230009, China

出　　处：《Acta Metallurgica Sinica(English Letters)》2010年第1期27-34,共8页金属学报（英文版）

基　　金：supported by National Natural Science Foundation of China(No50741003);Key Project of Science and Technology of Ministry of Education of China (No107066);Anhui Provincial Natural Science Foundation(No070414181)

摘　　要：Silver matrix composite brushes were fabricated by means of powder metallurgy, which included pressing at 300 MPa and then sintering for 1 h in pure H2 protective atmosphere at 700 ℃ and repressing at 500 MPa. Four kinds composites with different compositions were produced, and the mechanical properties and electrical wear performance were investigated. The results showed that the composite added with carbon nanotubes had a higher hardness and strength, a lower contact voltage drop and an excellent anti-wear property in electrical sliding wear, because of the reinforcement ability of carbon nanotubes. Adding graphite to the composite also decreased the wear loss and contact voltage drop, because graphite had an electrical current conducting ability which not only made the current pass the lubricating films easily but also eliminated and reduced the arc and spark effectively.Silver matrix composite brushes were fabricated by means of powder metallurgy, which included pressing at 300 MPa and then sintering for 1 h in pure H2 protective atmosphere at 700 ℃ and repressing at 500 MPa. Four kinds composites with different compositions were produced, and the mechanical properties and electrical wear performance were investigated. The results showed that the composite added with carbon nanotubes had a higher hardness and strength, a lower contact voltage drop and an excellent anti-wear property in electrical sliding wear, because of the reinforcement ability of carbon nanotubes. Adding graphite to the composite also decreased the wear loss and contact voltage drop, because graphite had an electrical current conducting ability which not only made the current pass the lubricating films easily but also eliminated and reduced the arc and spark effectively.

关 键 词：Ag-MoS2 composite Carbon nanotube GRAPHITE Contact voltage drop Friction coefficient Wear loss 

分 类 号：TB33[一般工业技术—材料科学与工程] TG174.442[金属学及工艺—金属表面处理]