Effect of Nano-Al2O3 Doping on Erosion Resistance of Tungsten-Copper Electrode under 100kA Pulsed Arc
Ren Shuai1, Gong Xin1, Dai Hongyu1, Lee Li1, Geng Hao2, Liu Yong3
1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science & Technology Wuhan 430074 China;; 2. The 713th Research Institute of China Shipbuilding Industry Corporation Zhengzhou 450015 China; 3. School of Materials Science and Engineering Henan University of Science and Technology Luoyang 471023 China
Abstract：The erosion resistance of electrode materials is one of the key factors affecting the performance and working life of gas spark switches. In order to explore whether the electrode material doped with nanoscale metalloid particles has stronger erosion resistance in the engineering application of strong pulse current, an shock large current discharge test platform was built, and W80/Cu and W80/Cu-Al2O3 were selected as the research object. The experimental study was carried out under a strong pulse current with a peak value over 100kA/0.54GW. By comparing the mass change, the microstructure and surface roughness of erosion point, it is found that the addition of nanometer Al2O3 makes the tungsten-copper alloy have stronger erosion resistance under strong pulse discharge. Combined with the erosion mechanism of electrode and the law of arc motion, it is analyzed that the erosion resistance of W80/Cu-Al2O3 is better than that of tungsten-copper alloy for the following reasons: the addition of Al2O3 reduces the mass of tungsten-copper alloy sputtering in the form of solid phase and liquid phase, and makes the distribution of cathode arc more uniform. As a result, the mass loss and surface roughness are reduced.
任帅, 宫鑫, 戴宏宇, 李黎, 耿昊, 刘勇. 百千安冲击电弧作用下纳米Al2O3掺杂对钨铜电极耐烧蚀性能的影响[J]. 电工技术学报, 2020, 35(9): 1880-1890.
Ren Shuai, Gong Xin, Dai Hongyu, Lee Li, Geng Hao, Liu Yong. Effect of Nano-Al2O3 Doping on Erosion Resistance of Tungsten-Copper Electrode under 100kA Pulsed Arc. Transactions of China Electrotechnical Society, 2020, 35(9): 1880-1890.
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2020, Vol. 35 
