|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Rare Metal Extraction & Processing
||Effects of Al2O3 and ZrO2 additions on electrical contact properties in Cu-Mo-Cr alloy
||Yeong woo Cho, Seok-jun Seo, Sung Gue Heo, Kee Ahn Lee, Kyoung Tae Park
|On-Site Speaker (Planned)
||Yeong woo Cho
The electrical contact material used in the vacuum interrupter requires physical properties such as thermal, electrical conductivity and high density and high hardness to minimize arc heat damage.
Copper-chromium system alloys are widely used as high voltage contact materials above 72.5 kV, but further research is needed to improve mechanical, electrical properties at high temperatures.
In this study, physical properties of sintered composites were compared after adding Cu-Mo-Cr powder and ceramic Al2O2 and ZrO2 powders according to their contents.
As a mixing method, 60wt.%Cu-30wt.%Mo-10wt.%Cr powder and 0.5wt% ~ 1.5wt.% of Al2O3 or ZrO2 were mixed by ball mill
after that, a green compact was manufactured by pressing at 148.5 MPa, and sintered in a furnace at 1250° C. for 5 hours.
The physical properties of the composite material with additive content were analyzed.
Tensile strength and hardness increased as the amount of addition increased, but conductivity decreased.