Influence of CuCr Electrode Composition on Two-Dimensional Electron and Metal Vapor Density Distribution over Vacuum Arc
Influence of CuCr Electrode Composition on Two-Dimensional Electron and Metal Vapor Density Distribution over Vacuum Arc
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CuCr电极成分对真空电弧二维电子和金属蒸气密度分布的影响
DOI：
10.1088/1361-6463/ab83bd
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Maeyama Mitsuaki
中科院分区：
文献类型：
--
作者：
Inada Yuki;Kikuchi Ryo;Nagai Hiroyuki;Kumada Akiko;Hidaka Kunihiko;Maeyama Mitsuaki
利用ShackHartmann型激光波前传感器系统地研究了在CuCr电极之间产生的真空电弧上的二维电子和金属蒸气密度分布的Cr含量依赖性，其中Cr含量为0 wt.%，25重量%，35重量%，50重量%和75重量%。Cr 25 wt.%时电子密度最高和Cr 35 wt.%，而对于相同的CuCr电极组合物，金属蒸气密度最低。这些实验结果表明与先前报道的CuCr组合物的电极侵蚀速率，阳极熔化的持续时间和电流为零后的剩余电荷的依赖性的高度一致性。此外，基于目前的密度数据和先前提出的介电恢复工艺，建议Cr25 wt.%和Cr 35 wt.%适用于强模式真空电弧的中断;相反，Cr 50 wt.%和Cr 75 wt.%对于扩散电弧中断是有用的。这一建议的有效性得到了以前的实验研究报告铬含量依赖于电弧电流中断能力和介电恢复速度。
ShackHartmann-type laser wavefront sensors were utilized for the systematic investigation on Cr content dependence of 2D electron and metal vapor density distributions over vacuum arcs generated between CuCr electrodes, whose Cr content were 0 wt.%, 25 wt.%, 35 wt.%, 50 wt.% and 75 wt.%. The electron density was highest for the Cr25wt.% and Cr35wt.%, while the metal vapor density was lowest for the same CuCr electrode compositions. These experimental results demonstrated high consistency with previously reported CuCr composition dependence of electrode erosion rates, duration time of anode melting and residual charge after current zero. Furthermore, based on the present density data and previously proposed dielectric recovery processes, it was suggested that Cr25wt.% and Cr35wt.% are suitable for the interruption of intense-mode vacuum arcs; instead, Cr50wt.% and Cr75wt.% are useful for diffused arc interruption. The validity of this suggestion was supported by previous experimental studies reporting Cr content dependence of arc current interruption capacities and dielectric recovery speeds.