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- Cu와 DyF3 분말의 혼합이 Nd-Fe-B 소결자석의 보자력에 미치는 영향
- 남궁석, 이민우, 이민우, 임태환, 김태훈, 이성래, 장태석
- Effect of Cu and DyF3 Powder Additions on the Coercivity of Sintered Nd-Fe-B Magnets
- S. NamKung, M.W. Lee, D.R. Dhakal, T.H. Lim, T.H. Kim, S.R. Lee, T.S. Jang
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Journal of Korean Powder Metallurgy Institute 2012;19(4):247-252
DOI: https://doi.org/10.4150/KPMI.2012.19.4.247
1선문대학교 대학원 재료금속공학과
2선문대학교 대학원 재료금속공학과
3선문대학교 대학원 재료금속공학과
4선문대학교 대학원 재료금속공학과
5고려대학교 신소재공학과
6고려대학교 신소재공학과
7선문대학교 대학원 재료금속공학과
1Department of Materials and Metallurgical Engineering, Graduate School, Sunmoon University
2Department of Materials and Metallurgical Engineering, Graduate School, Sunmoon University
3Department of Materials and Metallurgical Engineering, Graduate School, Sunmoon University
4Department of Materials and Metallurgical Engineering, Graduate School, Sunmoon University
5Department of Materials Science and Engineering, Korea University
6Department of Materials Science and Engineering, Korea University
7Department of Materials and Metallurgical Engineering, Grad
2선문대학교 대학원 재료금속공학과
3선문대학교 대학원 재료금속공학과
4선문대학교 대학원 재료금속공학과
5고려대학교 신소재공학과
6고려대학교 신소재공학과
7선문대학교 대학원 재료금속공학과
1Department of Materials and Metallurgical Engineering, Graduate School, Sunmoon University
2Department of Materials and Metallurgical Engineering, Graduate School, Sunmoon University
3Department of Materials and Metallurgical Engineering, Graduate School, Sunmoon University
4Department of Materials and Metallurgical Engineering, Graduate School, Sunmoon University
5Department of Materials Science and Engineering, Korea University
6Department of Materials Science and Engineering, Korea University
7Department of Materials and Metallurgical Engineering, Grad
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Abstract
Effect of Cu and DyF_3 powder mixing with Cu-free (Nd, Dy)-Fe-B jet-milled powder on the magnetic properties of sintered magnets was investigated. The coercivity of a magnet prepared from the Cu-free (Nd, Dy)-Fe-B powder was about 10 kOe even though the alloy powder already contained some Dy (3.5 wt%). When small copper powder was blended, however, the coercivity of the magnet increased almost 100%, exhibiting about 20 kOe. On the contrary, the coercivity enhancement was moderate, about 4 kOe, when dysprosium content in the sintered magnet was simply increased to 4.9 wt% by the addition of small DyF_33 powder.
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