W2C is synthesized through a reaction-sintering process from an ultrafine-W and WC powder mixture using spark plasma sintering (SPS). The effect of various parameters, such as W:WC molar ratio, sintering temperature, and sintering time, on the synthesis behavior of W2C is investigated through X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM) analysis of the microstructure, and final sintered density. Further, the etching properties of a W2C specimen are analyzed. A W2C sintered specimen with a particle size of 2.0 μm and a relative density over 98% could be obtained from a W-WC powder mixture with 55 mol%, after SPS at 1700℃ for 20 min under a pressure of 50 MPa. The sample etching rate is similar to that of SiC. Based on X-ray photoelectron spectroscopy (XPS) analysis, it is confirmed that fluorocarbon-based layers such as C-F and C-F2 with lower etch rates are also formed.

Abstract
1. 서 론
2. 실험방법
    2.1 W-WC 혼합분말 제조
    2.2 방전 플라즈마 소결
    2.3 W2C 시편의 식각특성 분석
3. 결과 및 고찰
4. 결 론
References

• 오규상(한국세라믹기술원 이천분원 엔지니어링세라믹센터, 고려대학교 신소재공학부) | Gyu-Sang Oh (Engineering Ceramics Center, Korea Institute of Ceramic Engineering and Technology/Department of Materials Science and Engineering, Korea University)
• 이성민(한국세라믹기술원 이천분원 엔지니어링세라믹센터) | Sung-Min Lee (Engineering Ceramics Center, Korea Institute of Ceramic Engineering and Technology)
• 류성수(한국세라믹기술원 이천분원 엔지니어링세라믹센터) | Sung-Soo Ryu (Engineering Ceramics Center, Korea Institute of Ceramic Engineering and Technology) Corresponding Author