미세구조 제어를 통한 (Nd,Dy)-Fe-B 소결자석의 보자력 증가
- Title
- 미세구조 제어를 통한 (Nd,Dy)-Fe-B 소결자석의 보자력 증가
- Other Titles
- The Coercivity Enhancement of (Nd,Dy)-Fe-B Sintered Magnet by Microstructure Control
- Author
- 김영도
- Keywords
- nd계희토류소결자석; Nd-rich; 액상온도; 승온; 냉각; 열수축; 열팽창; Nd-Fe-B magnets; Nd-rich phase; Isothermal sintering; Cyclic sintering; Coupling effect
- Issue Date
- 2011-02
- Publisher
- 한국분말야금학회
- Citation
- 한국분말야금학회지, 2011, 18(1), P.18-23
- 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 grains by the cyclic sintering.
- URI
- http://koreascience.or.kr/article/ArticleFullRecord.jsp?cn=BMOGBP_2011_v18n1_18
- ISSN
- 1225-7591
- DOI
- 10.4150/KPMI.2011.18.1.018
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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