石墨粒度对C/Cu复合材料载流摩擦磨损性能的影响

Effects of Graphite Particle Size on Friction and Wear Properties of C/Cu Composite

分别采用45、150μm两种粒度的镀铜石墨经粉末冶金法制得C/Cu复合材料,借助销-盘式载流摩擦磨损试验机研究了石墨粒度对C/Cu复合材料载流摩擦磨损性能的影响,利用电镜对磨擦表面进行微观分析。结果表明,45μm石墨颗粒较150μm石墨颗粒能够减少电弧发生,并提高该复合材料的力学性能和增强摩擦面润滑膜的形成,能有效降低该复合材料的摩擦系数和磨损率。

C/Cu composite was prepared by powder metallurgy with 45 p.m and 150 um copper coated graphite. The friction and wear property of the composite under electric current were studied on pin-disc testing machine. The wear surface of the sample was characterized by SEM. The results indicate that compared with 150 um graphite, 45 um graphite reduces the stimulation of arc, enhances the mechanical properties of composite, promotes the formation of lubricant film, and decreases friction coefficient and wear rate of the composite effectively.