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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2002.12
- 수록면
- 143 - 146 (4page)
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초록· 키워드
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Mechanical milling technique is considered to be a useful way of processing the fine Nd-Fe-B-type powder with high coercivity. In the present study, phase evolution of the Nd_(15)(Fe_(1-x)Co_x)_(77)B_8 (x=0~0.6) alloys during the high energy mechanical milling and annealing was investigated. The effect of Co-substitution on the crystallization of the mechanically milled Nd_(15)(Fe_(1-x)Co_x)_(77)B_8 amorphous material was examined. The Nd-Fe-B-type alloys can be amorphized completely by a high-energy mechanical milling. On annealing of the amorphous material, fine α-Fe crystallites form first from the amorphous. These fine α-Fe crystallites reacts with the remaining amorphous afterwards, leading to crystallization to Nd₂Fe₁₄B phase. The Co-substitution for Fe in Nd_(15)(Fe_(1-x)Co_x)_(77)B_8 μx=0~0.6) alloys lower significantly the crystallization temperature of the amorphous phase to the Nd₂Fe₁₄B phase. The mechanically milled and annealed Nd_(15)Fe_(77)B_8 alloy without Co-substitution exhibits consistently better magnetic properties with respect to the alloys with Co-substitution.
목차
Abstract
1. Introduction
2. Experimental
3. Results and Discussion
4. Conclusion
Acknowledgment
References
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