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Fabrication and Evaluation of WC-3 wt%Co Compacts Fabricated by Spark Plasma Sintering

방전플라즈마소결법을 이용한 WC-3 wt%Co 소결체 제조 및 평가

  • Choi, Jung-Chul (Korea Institute of Industrial Technology (KITECH), Gwangju Research Center) ;
  • Chang, Se-Hun (Korea Institute of Industrial Technology (KITECH), Gwangju Research Center) ;
  • Cha, Young-Hoon (Department of Mechanical Engineering, Chosun University) ;
  • Oh, Ik-Hyun (Korea Institute of Industrial Technology (KITECH), Gwangju Research Center)
  • 최정철 (한국생산기술연구원 광주연구센터) ;
  • 장세훈 (한국생산기술연구원 광주연구센터) ;
  • 차용훈 (조선대학교 공과대학 기계공학과) ;
  • 오익현 (한국생산기술연구원 광주연구센터)
  • Published : 2008.07.27

Abstract

Microstructure and mechanical properties of WC-3 wt% Co cemented carbides, fabricated by a spark plasma sintering (SPS) process, were investigated in this study. The WC-3 wt%Co powders were sintered at $900{\sim}1100^{\circ}C$ for 5min under 40MPa in high vacuum. The density and hardness were increased as the sintering temperature increased. WC-3 wt%Co compacts with a relative density of 97.1% were successfully fabricated at $1100^{\circ}C$. The fracture toughness and hardness of a compact sintered at $1100^{\circ}C$ were $21.6 MPa{\cdot}m^{1/2}$ and 4279 Hv, respectively.

Keywords

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