Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Fabrication and Mechanical Properties of ultra fine WC-6wt.%Co by Spark Plasma Sintering Process

방전플라즈마 소결 공정을 이용한 WC-6wt.%Co 소결체 제조 및 기계적 특성 평가

  • Park, Hyun-Kuk (Korea Institute of Industrial Technology (KITECH), Automotive Components Center) ;
  • Lee, Seung-Min (Korea Institute of Industrial Technology (KITECH), Automotive Components Center) ;
  • Youn, Hee-Jun (Korea Institute of Industrial Technology (KITECH), Automotive Components Center) ;
  • Bang, Ki-Sang (Korea Institute of Industrial Technology (KITECH), Automotive Components Center) ;
  • Oh, Ik-Hyun (Korea Institute of Industrial Technology (KITECH), Automotive Components Center)
  • 박현국 (한국생산기술연구원 동력부품센터) ;
  • 이승민 (한국생산기술연구원 동력부품센터) ;
  • 윤희준 (한국생산기술연구원 동력부품센터) ;
  • 방기상 (한국생산기술연구원 동력부품센터) ;
  • 오익현 (한국생산기술연구원 동력부품센터)
  • Received : 2010.09.30
  • Published : 2011.01.25
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Abstract

Using the spark plasma sintering process (SPS process), the WC-6wt.%Co hard materials were densified using an ultra fine WC-Co powder. The WC-Co was almost completely dense with a relative density of up to 100% after the simultaneous application of a pressure of 60 MPa and the DC pulse current for 3 min without any significant change in the grain size. The average grain size of WC that was produced through this experiment was about $0.2{\sim}0.8{\mu}m$. The hardness and fracture toughness were about $1816kg/mm^2$ and $15.1MPa{\cdot}m^{1/2}$, respectively, for 60 MPa at $1200^{\circ}C$.

Keywords

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