한국분말재료학회지 (Journal of Powder Materials)

  • 제18권1호
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  • Pages.18-23
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  • 2011
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  • 2799-8525(pISSN)
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  • 2799-8681(eISSN)
한국분말재료학회 (*구 분말야금학회) (The Korean Powder Metallurgy & Materials Institute)
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미세구조 제어를 통한 (Nd,Dy)-Fe-B 소결자석의 보자력 증가

The Coercivity Enhancement of (Nd,Dy)-Fe-B Sintered Magnet by Microstructure Control

  • Kim, Jin-Woo (Department of Materials Science and Engineering, Hanyang University) ;
  • Kim, Se-Hoon (Department of Materials Science and Engineering, Hanyang University) ;
  • Kim, Young-Do (Department of Materials Science and Engineering, Hanyang University)
  • 투고 : 2011.01.03
  • 심사 : 2011.01.28
  • 발행 : 2011.02.28
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초록

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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참고문헌

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피인용 문헌

  1. Magnetic Properties and Sintering Behavior of (Nd,Dy)-Fe-B Permanent Magnet by Spark Plasma Sintering vol.19, pp.2, 2012, https://doi.org/10.4150/KPMI.2012.19.2.105