摘要
采用粉末冶金方法在相同的工艺条件下制备CNTs-Cu和C-Cu复合材料。采用销盘式载流摩擦磨损试验机对两种材料的载流摩擦学行为进行研究。结果表明:铜基复合材料的摩擦因数和磨损率均随着增强体含量的增加而减小,随着电流密度的增加而增大;电流对C-Cu复合材料的影响更加显著;C-Cu复合材料的主导磨损机制是电弧烧蚀和粘着磨损,而CNTs-Cu复合材料的主导磨损机制是粘着磨损和塑性流动变形。
CNTs-Cu and graphite-Cu composites were separately prepared by powder metallurgy technique under the same consolidation processing. Tribological behavior of the composites with electric current was investigated by using a pin-on-disk friction and wear tester. The results show that the friction coefficient and wear rate of the composites decrease with increasing the reinforcement content, and increase with increasing the electric current density; the effects of electric current are more obvious on tribological properties of graphite-Cu composites than on CNTs-Cu composites; for graphite-Cu composites the dominant wear mechanisms are electric arc erosion and adhesive wear, while for CNTs-Cu composites are adhesive wear.
作者
许玮
胡锐
李金山
张永振
傅恒志
XU Wei;HU Rui;LI Jin-shan;ZHANG Yong-zhen;FU Heng-zhi(State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an 710072,China;Engineering School,Shanxi Datong University,Datong 037003,China;Laboratory of Material Tribology,Henan University of Science and Technology,Luoyang 471003,China)
基金
Project (2007CB607603) supported by the National Basic Research Program of China
关键词
铜基复合材料
摩擦学行为
载流
磨损机制
Cu matrix composite
tribological behaviors
electric current
wear mechanisms
