电弧能量对C/C复合材料的载流摩擦磨损行为的影响

Influence of Arc Energy on the Friction and Wear Behaviors of C/C Composites

在自制的销盘载流摩擦磨损试验机上,研究电弧能量对C/C复合材料/铬青铜摩擦副载流摩擦磨损行为的影响,并利用扫描电镜和能谱仪等对磨损表面进行了表征。结果显示,随着电弧能量的增加,C/C复合材料的磨损也随之增加;在较低的电弧能量下,电弧对材料的侵蚀不严重,材料的磨损也不严重,其磨损机制主要表现为磨粒磨损和少量的电气磨损,随着电弧能量的增加,磨损率急剧增加,此时磨损机制主要表现为电气磨损;在电弧作用下,C/C复合材料的电弧侵蚀机制为蒸发侵蚀和材料转移。

The friction and wear behaviors of C/C composite/QCr0. 5 couples were investigated on the HST-100 tribo- tester by simulating the working conditions of the pantograph-wire system of the electric railway. With the help of SEM and XRD,the morphologies of worn surfaces of pin specimen were examined. The results indicate that with the increase of arc energies, the wear rate of C/C composites increases. In the lower arc energies, the arc erosion and wear of the couples are not serious, and abrasive wear and arc erosion are the dominant mechanism. With the increase of arc energies, the wear rate of the couples sharply increases, and arc erosion is the dominant mechanism. Evaporation erosion and material transfer are the dominant mechanism under the arc erosion during the electrical sliding processes.