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자료유형
학술저널
저자정보
저널정보
한국자기학회 Journal of Magnetics Journal of Magnetics Vol.4 No.4
발행연도
1999.12
수록면
123 - 127 (5page)

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The Ga-stabilised Sm₂Fe_(17)-type alloy can hardly be disproportionated under ordinary HDDR condition. The HDDR characteristics of Ga-substituted Sm₂Fe_(17)-type alloy were examined, and, in particular, the effect of particle size on the disproportionation of the Ga-substituted alloy was investigated in detail. The reaction characteristics of the Sm₂Fe_(17)-type alloys with or without Ga-substitution with methane (CH₄) gas are also examined. The Ga-stabilised Sm₂Fe_(17)-type alloy was able to be disproportionated significantly on heating up to 800℃ under hydrogen with normal pressure. The particle size influenced significantly on the disproportionation of the Ga-substituted alloy, and the material with finer particle size (< 40 ㎛) was fully disproportionated on heating up to around 800℃ under hydrogen gas with normal pressure. The Ga-substituted alloy has a very sluggish recombination kinetics with respect to the alloy without Ga-substitution. The Sm₂Fe_(17)C_X-type carbide was stabilised significantly by the Ga-substitution for Fe in the parent alloy. While the Sm₂Fe_(17)C_X was disproportionated below 800℃ the Ga-stabilised Sm₂Fe_(15)Ga₂C_X carbide remained intact even on heating up to 800℃.

목차

Abstract

1. Introduction

2. Experimental Work

3. Results and Discussion

4. Conclusions

Acknowledgement

References

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