Tungsten carbide (WC) hard materials are used in various industries and possess a superior hardness compared to other hard materials. They have particularly high melting points, high strength, and abrasion resistance. Accordingly, tungsten carbide hard materials are used for wear-resistant tools, cutting tools, machining tools, and other tooling materials. In this study, the WC-5wt.%Co, Fe, Ni hard materials are densified using the horizontal ball milled WC-Co, WC-Fe, and WC-Ni powders by a spark plasma sintering process. The WC-5Co, WC-5Fe, and WC-5Ni hard materials are almost completely densified with a relative density of up to 99.6% after simultaneous application of a pressure of 60 MPa and an electric current for about 15 min without any significant change in the grain size. The average grain size of WC-5Co, WC-5Fe, and WC-5Ni that was produced through SPS was about 0.421, 0.779, and 0.429 μm, respectively. The hardness and fracture toughness of the dense WC-5Co, WC-5Fe, WC-5Ni hard materials were also investigated.

Abstract
 1. 서 론
 2. 실험방법
 3. 실험결과 및 고찰
 4. 결 론
 References

• 김주훈(한국생산기술연구원 EV부품소재그룹) | Ju-Hun Kim (Korea Institute of Industrial Technology (KITECH), EV Components Materials)
• 오익현(한국생산기술연구원 EV부품소재그룹) | Ik-Hyun Oh (Korea Institute of Industrial Technology (KITECH), EV Components Materials)
• 이정한(한국생산기술연구원 EV부품소재그룹/전남대학교 신소재공학과) | Jeong-Han Lee (Korea Institute of Industrial Technology (KITECH), EV Components Materials/Division of Advanced Materials Engineering, Chonnam National University)
• 홍성길(전남대학교 신소재공학과) | Sung-Kil Hong (Division of Advanced Materials Engineering, Chonnam National University)
• 박현국(한국생산기술연구원 EV부품소재그룹) | Hyun-Kuk Park (Korea Institute of Industrial Technology (KITECH), EV Components Materials) Corresponding Author