High coercive Nd-Fe-B magnets fabricated via two-step sintering
- Title
- High coercive Nd-Fe-B magnets fabricated via two-step sintering
- Author
- 김영도
- Keywords
- Rare earth magnet; Nd-Fe-B alloy; Two-step sintering; Coercivity
- Issue Date
- 2011-11
- Publisher
- Elsevier Science B.V
- Citation
- Journal of Magnetism and Magnetic Materials, 2011, 323(22), P.2851-2854
- Abstract
- The fabrication of Nd(11)Dy(4)Fe(76.5)TM(2.5)B(6) (TM=Co, Cu, Al, and Nb: at%) sintered magnets via a two-step sintering process was demonstrated. A densification of greater than 99% was achieved using the two-step sintering of the Nd-Fe-B powder. This process produced a sample with an average grain size of 6.2 mu m in the Nd(2)Fe(14)B phase, resulting in an enhancement of the coercivity compared to that of the isothermally sintered sample. The suppression of grain growth was considered to be affected by the relatively low temperature during the two-step sintering and by the presence of a B-rich phase at the triple junction. Consequently, the two-step sintering process led to suppression of grain growth and a uniform grain size distribution, which resulted in improved magnetic properties, in particular in the intrinsic coercivity. (C) 2011 Elsevier B.V. All rights reserved.
- URI
- https://www.sciencedirect.com/science/article/abs/pii/S030488531100388X
- ISSN
- 0304-8853
- DOI
- 10.1016/j.jmmm.2011.06.034
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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