Vacuum Breakdown Characteristics of Oxygen-free Copper Electrodes Treated with Hot Isostatic Pressing Method

摘要

It is generally agreed that physically hard electrode's materials have higher voltage holding characteristics in vacuum. In this paper, we applied a hot isostatic pressing method (HIP) to oxygen-free-copper electrodes for high voltage gap in vacuum, because HIP treatment makes material harder. Experimental results revealed that the breakdown voltage for HIP treated oxygen-free-copper exhibited 63.1% higher than that of untreated oxygen-free copper.