Vacuum breakdown properties of CuCr contacts prepared by hot isostatic pressing

doi:10.13251/j.issn.0254-6051.2020.02.034

Abstract

Abstract:

CuCr alloy materials with a nearly full density and low-oxygen nitrogen content were prepared by hot isostatic pressing (HIP).The Cr phase granularity, break down field strength and break down area were systemically investigated for the CuCr alloys under different sintering temperatures. The relationship between the Cr phase particle radius and the breakdown field strength of CuCr alloy was explored. The results indicate that on a certain range as the HIP sintering temperature increases, the particle size of the CuCr alloy materials gradually increases. Then the larger the particle radius of CuCr alloy Cr phase, the smaller the vacuum electric breakdown field strength will be. Finally, when the particle radius of CuCr alloy Cr phase increases, the break down ablation area tends to expand, and the ablation pit also slightly deepens.

Key words: CuCr alloys, hot isostatic pressing(HIP), sintering temperature, particle size, break down field strength

CLC Number:

TG144

Guo Yangyang, Wang Fazhan, Wang Yongbin, Lü Qinliang. Vacuum breakdown properties of CuCr contacts prepared by hot isostatic pressing[J]. HTM, 2020, 45(2): 181-185.

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