W-10 wt% Ti alloys that have a homogeneous microstructure are prepared by thermal decomposition of WO3-TiH2 powder mixtures and spark plasma sintering. The reduction and dehydrogenation behavior of WO3 and TiH2 are analyzed by temperature programmed reduction and a thermogravimetric method, respectively. The X-ray diffraction analysis of the powder mixture, heat-treated in an argon atmosphere, shows W- oxides and TiO2 peaks. Conversely, the powder mixtures heated in a hydrogen atmosphere are composed of W, WO2 and TiO2 phases at 600 ℃ and W and W-rich β phases at 800 ℃. The densified specimen by spark plasma sintering at 1500 ℃ in a vacuum using hydrogen-reduced WO3-TiH2 powder mixtures shows a Vickers hardness value of 4.6 GPa and a homogeneous microstructure with pure W, β and Ti phases. The phase evolution dependent on the atmosphere and temperature is explained by the thermal decomposition and reaction behavior of WO3 and TiH2.

Abstract
 1. 서 론
 2. 실험 방법
 3. 결과 및 고찰
 4. 결 론
 References

• 강현지(서울과학기술대학교 신소재공학과) | Hyunji Kang (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
• 김헌주(서울과학기술대학교 신소재공학과) | Heun Joo Kim (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
• 한주연(서울과학기술대학교 신소재공학과) | Ju-Yeon Han (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
• 이윤주(서울과학기술대학교 신소재공학과) | Yunju Lee (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
• 정영근(부산대학교 융합학부) | Young-Keun Jeong (Graduate School of Convergence Science, Pusan National University)
• 오승탁(서울과학기술대학교 신소재공학과) | Sung-Tag Oh (Department of Materials Science and Engineering, Seoul National University of Science and Technology) Corresponding author