Microstructure and Electrical Sliding Tribology of Gr/CuCrZr Composites
The present work was undertaken to prepare graphitic Cu-Cr-Zr matrix composites in order to develop new materials for application under sliding contact in an electrical field. The electrical sliding wear behavior of the Gr/CuCrZr composite was investigated from a microstnictural viewpoint, compared with the matrix alloy. The results indicate that by using the water atomized Cu-Cr-Zr powder and copper-coated graphite particles as starting materials, compact and homogeneous microstructure can be obtained in the composites. Fine and coherent paniculate precipitations are formed in the Cu-Cr-Zr matrix during the aging treatment process, which help to improve the mechanical properties. Under the electrical sliding wear condition, incorporation of graphite in the Cu-Cr-Zr matrix not only decrease the wear loss of the sliding pair but also maintain steady-state friction coefficient. The main reason is that the graphite film that smears on the contacting surfaces can alleviate materials loss induced by electric arc discharge and adhesion wear. Proper aging treatment helps to make full use of the solid lubricant effect of the graphite particles.
Cu-Cr-Zr matrix composite Electrical sliding wear Graphite particles Aging treatment
Yongzhong Zhan Haofeng Xie Xiabo Shi Yinghong Zhuang Lingmin Zeng
Key Laboratory of Nonferrous Metal Materials and New Processing Technology, Ministry of Education, Guangxi University, Nanning, Guangxi 530004, P. R. China
国际会议
厦门
英文
450-457
2006-11-08（万方平台首次上网日期，不代表论文的发表时间）