In this study, factors considered to be causes of promotion of densification of sintered pellets identified during phase change are reviewed. As a result, conclusions shown below are obtained for each factor. In order for MA powder to soften, a temperature of 1,000 K or higher is required. In order to confirm the temporary increase in density throughout the sintered pellet, the temperature rise due to heat during phase change was found not to have a significant effect. While examining the thermal expansion using the compressed powder, which stopped densification at a temperature below the MA powder itself, and the phase change temperature, no shrinkage phenomenon contributing to the promotion of densification is observed. The two types of powder made of Ti-silicide through heat treatment are densified only in the high temperature region of 1,000 K or more; it can be estimated that this is the effect of fine grain superplasticity. In the densification of the amorphous powder, the dependence of sintering pressure and the rate of temperature increase are shown. It is thought that the specific densification behavior identified during the phase change of the Ti-37.5 mol.%Si composition MA powder reviewed in this study is the result of the acceleration of the powder deformation by the phase change from non-equilibrium phase to equilibrium phase.

Abstract
1. 서 론
2. 실험 방법
3. 결과 및 고찰
    3.1 상변화 시의 밀도증가 원인에 대하여
    3.2 상변화 시의 발열에 대하여
    3.3 상변화에 따른 체적변화
    3.4 열처리로 결정화된 분말의 치밀화거동
    3.5 압력 및 승온속도 의존성
4. 결 론
References

• 한창석(호서대학교 자동차ICT공학과) | Chang-Suk Han (Dept. of ICT Automotive Engineering, Hoseo University) Corresponding author
• 진성윤(호서대학교 자동차ICT공학과) | Sung-Yooun Jin (Dept. of ICT Automotive Engineering, Hoseo University)
• 권혁구(호서대학교 환경공학과) | Hyuk-Ku Kwon (Dept. of Environmental Engineering, Hoseo University)