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Dy 화합물 혼합에 의한 (Nd, Dy)-Fe-B 소결자석의 자기특성 변화 KCI 등재

Magnetic Properties of (Nd, Dy)-Fe-B Sintered Magnets Mixed with Dy Compounds

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한국분말야금학회지 (Journal of Korean Powder Metallurgy Institute)
한국분말재료학회(구 한국분말야금학회) (Korean Powder Metallurgy Institute)
초록

In order to increase the coercivity of (Nd, Dy)-Fe-B sintered magnets without much reduction of remanence, small amount of Dy compounds such as and was mixed with (Nd, Dy)-Fe-B powder. After mixing, the coercivity of (Nd, Dy)-Fe-B sintered magnets apparently increased with the increase of Dy compound in the mixture. Addition of was more effective than for the improvement of coercivity. Reduction of the remanence by the addition of Dy compound, however, was larger than expected mostly due to unresolved coarse Dy compound in the magnet. EPMA analysis revealed that Dy was diffused throughout the grains in the magnet mixed with whereas Dy was rather concentrated around grain boundaries in the magnet mixed with .

저자
  • 남궁석 | NamKung S.
  • 이민우 | Lee M.W.
  • 조인식 | Cho I.S.
  • 박영덕 | Park Y.D.
  • 임태환 | Lim T.H.
  • 이성래 | Lee S.R.
  • 장태석 | Jang T.S.