高功率气体火花开关电极烧蚀机理研究

 从热力学的角度，对高功率气体火花开关的电极烧蚀过程进行了理论分析，建立了该烧蚀过程的简化数学模型并进行了数值求解；研究了电极烧蚀深度与密度、定压比热容、熔点、沸点、热导率、熔解热等电极材料特性参数的关系；比较了钨、铜、铝三种常用电极材料的耐烧蚀能力，结果表明钨的耐烧蚀能力最强，铜次之。

Study on mechanism of electrode erosion of high-power gas spark gap switch

From thermodynamics, the electrode erosion process of high-power gas spark gap switch is analysed in theory. The simplified mathematical model is built and solved numerically, the relations between electrode erosion depth and some characteristics of electrode materials such as density, specific heat, melting point, boiling point, thermal conductivity, and so on, are studied. The capabilities of three common electrodes (made of Cu, W, and Al) to resist erosion are compared, which indicates that a ranking of the erosion rate for three materials, from least to greatest, is W, Cu, Al.