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http://dx.doi.org/10.4150/KPMI.2017.24.5.377

Microstructure and Electric Contact Properties of Spark Plasma Sintered Ta-Cu Composite  

Ju, Won (Korea Institute for Rare Metals, Korea Institute of Industrial Technology)
Kim, Young Do (Division of Materials Science and Engineering, Hanyang University)
Sim, Jae Jin (Korea Institute for Rare Metals, Korea Institute of Industrial Technology)
Choi, Sang-Hoon (Korea Institute for Rare Metals, Korea Institute of Industrial Technology)
Hyun, Soong Keun (Department of advanced materials engineering, Inha university)
Lim, Kyoung Mook (Korea Institute for Rare Metals, Korea Institute of Industrial Technology)
Park, Kyoung-Tae (Korea Institute for Rare Metals, Korea Institute of Industrial Technology)
Publication Information
Journal of Powder Materials / v.24, no.5, 2017 , pp. 377-383 More about this Journal
Abstract
Microstructure, electric, and thermal properties of the Ta-Cu composite is evaluated for the application in electric contact materials. This material has the potential to be used in a medium for a high current range of current conditions, replacing Ag-MO, W, and WC containing materials. The optimized SPS process conditions are a temperature of $900^{\circ}C$ for a 5 min holding time under a 30 MPa mechanical pressure. Comparative research is carried out for the calculated and actual values of the thermal and electric properties. The range of actual thermal and electric properties of the Ta-Cu composite are 50~300 W/mk and 10~90 %IACS, respectively, according to the compositional change of the 90 to 10 wt% Ta-Cu system. The results related to the electric contact properties, suggest that less than 50 wt% of Ta compositions are possible in applications of electric contact materials.
Keywords
Spark Plasma Sintering; Ta-Cu composite; Electric contact materials; Thermal and electric conductivity;
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