지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2001.12
- 수록면
- 122 - 125 (4page)
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초록· 키워드
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Phase relationships of the HDDR (hydrogenation, disproportionation, desorption and recombination)-treated Sm₃(Fe,M)_(29)-type alloy with chemical composition of Sm_9Fe_(65)Co_(20)V_6 were studied by X-ray diffraction (XRD) and by thermomagnetic analysis (TMA). The alloy was disproportionated into a mixture of SmHx and α-Fe at high temperature under hydrogen gas. The disproportionated material was recombined into a mixture of Sm(Fe,M) (M = Co and/or V) and α-Fe phases. The structure of the Sm-(Fe,M) phase was dependent upon the recombination conditions, and a detailed phase diagram showing the phase relationships in the HDDR-treated alloy has been established. The Sm-(Fe,M) phase in material recombined above 900℃ had the Sm₂Fe_(17)-type structure, and it exhibited the SmFe_7-type structure when recombined at temperatures ranging from 700℃ to 850℃. Recombination below 650℃ led to the SmFe₃-type structure of the Sm-(Fe,M) phase. Curie temperatures of the Sm-(Fe,M) phases in the recombined material were significantly higher than those of the corresponding stoichiometric phases. It was suggested that the chemical composition of the Sm-(Fe,M) phases may be significantly different from that of the corresponding stoichiometric phases. All the HDDR-treated Sm_9Fe_(65)Co_(20)V_6 materials showed the soft magnetic features regardless of the phase constitution.
목차
Abstract
1. Introduction
2. Experimental Work
3. Results and Discussion
4. Conclusion
Acknowledgement
References
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