Arc Erosion Wear Characteristics and Mechanisms of Pure Carbon Strip Against Copper Under Arcing Conditions
Arc Erosion Wear Characteristics and Mechanisms of Pure Carbon Strip Against Copper Under Arcing Conditions
复制标题
电弧条件下纯碳带对铜的电弧侵蚀磨损特性及机理
DOI：
10.1007/s11249-013-0267-y
复制
发表时间：
2014-01-01
影响因子：
3.2
通讯作者：
Chen, Jianghua
中科院分区：
文献类型：
--
作者：
Xiong, Xianzhi;Tu, Chuanjun;Chen, Jianghua
研究了连续电弧条件下纯碳带对铜（碳/铜对）的磨损行为。为了模拟大电流连续电弧放电的极端工况，在自制磨损试验机上进行了滑动磨损试验。通过对碳带磨痕和磨屑的详细分析，研究了碳/铜对的电弧蚀磨损特性和机理。因此，利用拉曼光谱、透射和扫描电子显微镜以及聚焦离子束系统等各种分析技术来表征碳带的磨痕和磨屑。结果表明，碳带的磨损率和电弧侵蚀程度随着电流密度的增加而增加。典型的缠绕乱层碳纳米球（ETCN）表现出球状堆叠结构，在电流摩擦过程中产生的碳带磨损碎片的微观结构中观察到，这是碳材料在电弧和滑动摩擦条件下织构变化的特征。此外，ETCN的数量和尺寸随着电流密度的增加而增加。碳/铜对的电弧侵蚀磨损机制主要是由于连续电弧作用下氧化烧蚀、局部电弧冲击和高温石墨化的协同作用。
The wear behavior of pure carbon strip against copper (carbon/copper pair) under continuous arcing condition was investigated. To simulate the extreme condition of continuous arc discharge at high current, sliding wear tests were conducted on a home-made wear tester. The arc erosion wear characteristics and mechanisms of carbon/copper pair were studied by analyzing the wear scars and wear debris of the carbon strip in detail. Therefore, various analytical techniques, including Raman spectroscopy, transmission and scanning electron microscopy, and focused ion beam systems, were utilized to characterize the wear scars and wear debris of the carbon strip. The results show that the wear rate and the degree of arc erosion of the carbon strip increase with increasing electric current density. Typical entwined turbostratic carbon nanospheres (ETCNs) exhibited sphere-like stacking structure that were observed in the microstructure of the wear debris of the carbon strip produced during the friction process with current, which is the characteristic of the textural changes in carbon materials under combined arcing and sliding friction conditions. Moreover, the number and size of ETCNs increase with the electric current density increase. The arc erosion wear mechanisms of the carbon/copper pair are mainly due to the synergetic action of oxidation ablation, local electric arc impact and high-temperature graphitization under continuous arcing.