圆周速度对碳纳米管-银-石墨复合材料接触电压降的影响  

Effect of circular velocity on the contact voltage drop of CNT-Ag-G composite

作　　者：徐屹[1] 凤仪[1] 王松林[1] 张学斌[1] 张敏[1] 沈剑[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009

出　　处：《功能材料》2006年第2期225-227,共3页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50271021);安徽省自然科学基金资助项目(03044601)

摘　　要：采用粉末冶金方法制备碳纳米管-银-石墨复合材料,研究圆周速度对复合材料接触电压降的影响。结果表明,当压力一定时,随着圆周速度的增大,复合材料的接触电压降略有增加,而圆周速度增大到一定值后,接触电压降急剧增加并伴有火花磨损出现。压力较小时(1N/cm2)圆周速度为7.5m/s时就出现电火花,压力较大时(2.5N/cm2)圆周速度为15m/s出现电火花。在圆周速度不变的条件下,接触电压降先升后降最后趋于稳定。In this paper, CNT-Ag-G composite brushes were fabricated by means of powder metallurgy, and the effect of the circular velocity on the contact voltage drop of CNT-Ag-G composite was studied. As the results show, when the pressure is certain, the contact vottage drop increases a little with the increase of the circular velocity, while the circular velocity reaches a definite value, the contact voltage drop increases sharply with the electric spark. When tile pressure is low （1N/cm^2） , electric spark comes out when the circular velocity reaches 7.5m/s. While the pressure becomes higher （2.5N/cm^2 ）, etectric spark comes out until 15m/s. Under the condition of constant circular velocity, the contact voltage drop curve falls down after it ascends first, and finally tends to be stabile.

关 键 词：碳纳米管-银-石墨复合材料 接触电压降 圆周速度 润滑膜 

分 类 号：TQ135.12[化学工程—无机化工] TQ150.41