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방전플라즈마 소결 공정을 이용한 WC-6wt.%Co 소결체 제조 및 기계적 특성 평가
박국현 ( Hyun Kuk Park ),이승민 ( Seung Min Lee ),윤희준 ( Hee Jun Youn ),방기상 ( Ki Sang Bang ),오익현 ( Ik Hyun Oh ) 대한금속재료학회(구 대한금속학회) 2011 대한금속·재료학회지 Vol.49 No.1
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 0.2~0.8 μm. The hardness and fracture toughness were about 1816 kg/mm2 and 15.1 MPa·m1/2, respectively, for 60 MPa at 1200℃.