论文部分内容阅读
采用粉末冶金方法在相同的工艺条件下制备纯铜和碳纳米管含量为10%(体积分数)的铜基复合材料。在一种销盘式载流摩擦磨损试验机上考察了不同电流条件下2种材料的载流摩擦磨损性能。结果表明:纯铜和铜基复合材料的摩擦系数和磨损率均随电流的增大而增大,但是电流对纯铜材料的影响更加显著;纯铜材料的主导磨损机制是电弧烧蚀磨损,而铜基复合材料的主导磨损机制是塑性流动变形;碳纳米管可以改善铜基复合材料的载流摩擦磨损性能。
The powder metallurgy method was used to prepare copper matrix composites with pure copper and carbon nanotubes content of 10% (volume fraction) under the same process conditions. The current carrying friction and wear properties of two kinds of materials under different current conditions were investigated on a pin-plate type current-carrying friction and wear tester. The results show that the friction coefficient and wear rate of pure copper and copper matrix composites increase with the increase of current, but the current has a more significant effect on pure copper. The dominant wear mechanism of pure copper is arc ablation wear, The dominant wear mechanism of Cu-based composites is plastic flow deformation. Carbon nanotubes can improve the current-carrying friction and wear properties of Cu-based composites.