Sliding wear behavior of copper alloy impregnated C/C composites under an electrical current
Sliding wear behavior of copper alloy impregnated C/C composites under an electrical current
复制标题
DOI：
10.1016/j.wear.2012.11.029
复制
发表时间：
2013-04-01
期刊：
影响因子：
5
通讯作者：
Kakishima, Hideshi
中科院分区：
文献类型：
--
作者：
Kubota, Yoshitaka;Nagasaka, Sei;Kakishima, Hideshi
在施加直流电流的情况下，使用环-块式磨损试验机研究了铜浸渍碳纤维增强碳复合材料（C/C复合材料）的磨损行为。对三种类型的C/C复合材料接触条材料进行了测试。磨损试验在55.6 m/s的恒定滑动速度、59 N的法向载荷以及100至500 A的施加电流下进行。电弧放电率（定义为电弧放电时间与总滑动时间之比）在0%至35%之间。我们还使用激光闪光法和热重 - 差热分析（TG - DTA）研究了C/C复合材料的热性能和氧化性能。磨损实验结果表明，铜浸渍C/C复合材料接触条的磨损与电弧放电能量成正比，电弧放电能量可通过接触电压和电流的测量来计算。含有高强度碳纤维的C/C复合材料接触条在高电弧放电能量条件下更易磨损。由较高强度碳纤维制成的C/C复合材料具有较低的热导率，并且比含有较低强度碳纤维的C/C复合材料更易因氧化而热解或降解。这些差异被认为是导致磨损行为差异的原因。© 2012爱思唯尔有限公司。保留所有权利。
The wear behavior of copper-impregnated carbon fiber reinforced carbon composites (C/C composites) was investigated using a block-on-ring type wear tester during application of a DC electrical current. Three types of C/C composite contact strip materials were tested. The wear test was carried out at a constant sliding speed of 55.6 m/s with a normal load of 59 N, and applied electrical currents ranging from 100 to 500 A. The arc-discharging rate, which is defined as the ratio of arc-discharging time to total sliding time, ranged from 0% to 35%. We also investigated the thermal and oxidation properties of the C/C composites with the laser flash method and TG-DTA. The results of the wear experiments indicate that the wear of copper-impregnated C/C composite contact strips was proportional to the arc discharge energy, which can be calculated from measurements of contact voltage and electrical current. The C/C composite contact strips with high strength carbon fiber were more likely to wear under high arc discharge energy conditions. The C/C composites made of higher strength carbon fiber have lower thermal conductivities and were more likely to be pyrolyzed or degraded by oxidation than the C/C composite with lower strength carbon fiber. These differences are thought to contribute to the difference in the wear behavior. (C) 2012 Elsevier B.V. All rights reserved.