미세구조 제어를 통한 (Nd,Dy)-Fe-B 소결자석의 보자력 증가The Coercivity Enhancement of (Nd,Dy)-Fe-B Sintered Magnet by Microstructure Control
- Other Titles
- The Coercivity Enhancement of (Nd,Dy)-Fe-B Sintered Magnet by Microstructure Control
- Authors
- 김진우; 김세훈; 김영도
- Issue Date
- Feb-2011
- Publisher
- 한국분말야금학회
- Keywords
- Nd-Fe-B magnets; Nd-rich phase; Isothermal sintering; Cyclic sintering; Coupling effect
- Citation
- 한국분말야금학회지, v.18, no.1, pp 18 - 23
- Pages
- 6
- Indexed
- KCI
- Journal Title
- 한국분말야금학회지
- Volume
- 18
- Number
- 1
- Start Page
- 18
- End Page
- 23
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/169054
- DOI
- 10.4150/KPMI.2011.18.1.018
- ISSN
- 1225-7591
2287-8173
- Abstract
- Sintered Nd-Fe-B magnets are widely used in many fields such as motors, generators, actuators,microwaves and so on due to their excellent magnetic properties. Many researchers have shown that the Nd-rich phase was essentially important for high magnet properties. In this study, we focused on controlling of the Nd-rich phase to enhance magnetic properties by the cyclic sintering process. Nd-Fe-B based sintered magnets were prepared by isothermal sintering and cyclic sintering processes. Magnetic properties and microstructure of the magnets were investigated. The coercivity was enhanced from 21.2 kOe to 23.27 kOe after 10 cycles of the sintering.
The Nd-rich phase was effectively penetrated into the grain boundary between the Nd_2Fe_(14)B grains by the cyclic sintering.
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