A Comparative Study on the Properties of Cu-Cr-Mo System Electrical Contact Material by Sintering and Infiltration Method [post]

Yeong-Woo Cho, Jae-Jin Sim, Sung-Gue Heo, Jong-Soo Byeon, Kee-Ahn Lee, Taek-Soo Kim, Seok-Jun Seo, Kyoung-Tae Park
2020 unpublished
The contact materials in high-voltage vacuum interrupter require properties such as high conductivity, high density, and high hardness to minimize arc heat damage. In this study, copper–molybdenum-chromium alloys contact materials are examined for a high voltage contact material. Ball milling process was carried out after analyzing the raw materials of copper, chromium, and molybdenum powders. A green compact was produced using a high press with the mixed powder. Afterwards, composite was
more » ... ards, composite was produced by sintering method according to temperature and infiltration method according to Cu content in green compact. The composite of sintering method showed a density of 8.55 g/cm3 (relative density 93%) a hardness of 217 HV, and an electrical conductivity of 40.7 IACS% at 1200 °C. The composite of 10 wt.% Cu produced by the Cu infiltration method showed a density of 8.7 g/cm3 (relative density 94%), Hardness of 274HV and electrical conductivity of 39 IACS% at 1300 °C. The measurements of physical properties showed the new possibility of using the Cu–Cr–Mo alloy as a contact material for high-voltage vacuum interrupters.
doi:10.20944/preprints202009.0203.v1 fatcat:ymo4so7b2vh6pppgl43g6nrege