Arc Erosion Behavior and Mechanism of CuCr25 Cathode Material in Different Ambient Atmospheres [CuCr25 阴极材料在不同环境气氛下的电弧烧蚀行为及机理]

作者：Wang L.; Feng Y.^*; Cao M.; Zhao T.; Zhou Z.; Zhao H.

来源：Rare Metal Materials and Engineering, 2022, 51(9): 3172-3181.

• arc erosion
• CuCr25 cathode material
• different atmospheres

The arc erosion behavior of CuCr25 cathode material in oxygen, argon, and carbon dioxide atmospheres under voltage of 9 kV was studied. The arc duration and arc energy are decreased with changing the atmosphere in the order of oxygen, argon, and carbon dioxide, whereas the variation trend of breakdown strength is opposite. The erosion morphologies of molten pools, bulges, holes, splashes, and cracks formed on the CuCr25 material surface under the high temperature and high energy of the arc were analyzed by scanning electron microscope and three-dimensional laser scanning confocal microscope. The results indicate that the most severe erosion occurs in oxygen atmosphere and the slightest erosion occurs in carbon dioxide atmosphere, which can be attributed to the differences in arc energy. According to the results of X-ray photoelectron spectroscopy analysis, the oxidation reactions in oxygen and carbon dioxide atmospheres produce CuO, Cr2O3, and CrO3, while no new compounds are formed in argon atmosphere.

• 单位
  合肥工业大学