摘要
采用粉末冶金法制备碳纳米管/银/石墨复合材料(CNTs/Ag/G),研究了碳纳米管增强银/石墨复合材料的电接触性能。结果表明:随CNTs含量的增大,复合材料的布氏硬度、表面粗糙度和接触电阻均呈现先上升后下降的趋势,说明少量的CNTs可以起到提高电接触性能的积极作用。这是因为少量的碳纳米管可以均匀分散在复合材料基体中,能够起到很好的增强作用;随含量的继续增大,CNTs难以在基体中分散均匀,容易发生团聚,割裂基体,从而导致材料性能降低。
CNTs/Ag/G composites were prepared by means of powder metallurgical method and the electrical contact properties were examined.The results indicate that with the increasing of CNTs contents,Brinell hardness,surface roughness and contact resistance have the same trend:first increase then decrease,which means adding small amount of CNTs can improve the electrical contact properties.With small amount of CNTs in composites,CNTs can disperse homogeneously and better properties can be obtained.However,further inc...
出处
《润滑与密封》
CAS
CSCD
北大核心
2008年第4期51-55,共5页
Lubrication Engineering
基金
国家自然科学基金项目(50271021)
低维材料及其应用技术教育部重点实验室(KF0702)
合肥工业大学优秀博士培养基金项目
