The objective of this paper is to determine the reshaping of the micro-morphology feature in both the cathode and anode electrode surfaces after conditioning by lightning impulse voltage in vacuum gaps. Materials of the experimental rod-plane electrodes are Cu and stainless steel. The micro-morphology feature in the electrode surface is recorded by a 3D laser microscopy. Experimental results indicate that conditioning by the lightning impulse voltage reshaped the micro-morphology feature in both the cathode and anode electrode surfaces. The BD characteristics are closely related to the micro-morphology feature and roughness in the cathode surface after conditioning. Moreover, the conditioning process takes different effects in the cathode and anode surfaces. For cathode electrode, the main difference of the micro-morphology feature is in the distributing characteristics of the erosion regions. For anode electrode, there aree different patterns of the anodic conditioning mechanism of the micro-morphology feature. In the molten pattern, conditioning melted the anode surface and removed the micro-protrusions effectively. In the crater pattern, with the increasing BD voltage and energy, the material below the anode surface is heating, which is the cause of formation of the many craters in anode surface.

中文翻译：

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真空间隙雷电冲击电压调理下电极表面微形貌特征的重塑


本文的目的是确定真空间隙中雷电冲击电压调节后阴极和阳极电极表面微形貌特征的重塑。实验棒平面电极的材料为Cu和不锈钢。电极表面的微观形态特征由 3D 激光显微镜记录。实验结果表明，雷电冲击电压的调节重塑了阴极和阳极电极表面的微观形貌特征。 BD特性与调理后阴极表面的微观形貌特征和粗糙度密切相关。此外，调节过程对阴极和阳极表面产生不同的影响。对于阴极电极，微观形貌特征的主要区别在于侵蚀区域的分布特征。对于阳极电极，其微观形貌特征的阳极调节机制存在不同模式。在熔融模型中，调节熔化了阳极表面并有效地去除了微突起。在弹坑图案中，随着BD电压和能量的增加，阳极表面以下的材料被加热，这是阳极表面形成许多弹坑的原因。