百千安冲击电弧作用下纳米Al<sub>2</sub>O<sub>3</sub>掺杂对钨铜电极耐烧蚀性能的影响

doi:10.19595/j.cnki.1000-6753.tces.190284

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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.

Key words： Tungsten-copper electrode nano-Al₂O₃ particles nano-doping metal composite material erosion pulsed arc

Received: 19 March 2019 Published: 12 May 2020

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TM852

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	Ren Shuai
	Gong Xin
	Dai Hongyu
	Lee Li
	Geng Hao
	Liu Yong

Cite this article:

Ren Shuai,Gong Xin,Dai Hongyu等. Effect of Nano-Al₂O₃ Doping on Erosion Resistance of Tungsten-Copper Electrode under 100kA Pulsed Arc[J]. Transactions of China Electrotechnical Society, 2020, 35(9): 1880-1890.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.190284 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/I9/1880

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