This study explores reducing the oxygen content of a commercial Ti-48Al-2Cr-2Nb powder to less than 400 ppm by deoxidation in the solid state (DOSS) using Ca vapor, and investigates the effect of Ca vapor on the surface chemical state. As the deoxidation temperature increases, the oxygen concentration of the Ti-48Al-2Cr-2Nb powder decreases, achieving a low value of 745 ppm at 1100oC. When the deoxidation time is increased to 2 h, the oxygen concentration decreases to 320pp m at 1100oC, and the oxygen reduction rate is approximately 78% compared to that of the raw material. The deoxidized Ti-48Al-2Cr-2nb powder maintains a spherical shape, but the surface shape changes slightly owing to the reaction of Ca and Al. The oxidation state of Ti and Al on the surface of the Ti-48Al-2Cr-2Nb powder corresponds to a mixture of TiO2 and Al2O3. As a result, the peaks of metallic Ti and Ti suboxide intensify as TiO2 and Al2O3 in the surface oxide layer are reduced by Ca vapor deposition

Abstract
1. 서 론
2. 실험 방법
3. 결과 및 고찰
    3.1. 상의 변화
    3.2. 산소 함량의 변화
    3.3. 형상 및 표면의 변화
    3.4. 표면의 화학적 상태의 변화
4. 결 론
References

• 김태헌(전북대학교 신소재공학부) | Taeheon Kim (Division of Advanced Materials Engineering, College of Engineering, Jeonbuk National University)
• 권한중(전북대학교 신소재공학부) | Hanjung Kwon (Division of Advanced Materials Engineering, College of Engineering, Jeonbuk National University)
• 임재원(전북대학교 신소재공학부) | Jae-Won Lim (Division of Advanced Materials Engineering, College of Engineering, Jeonbuk National University) Corresponding Author