Magnetic and microstructural characteristics of Nd-Fe-B sintered magnets doped with Dy2O3 and DyF3 powders

Song E. Park, Tae Hoon Kim, Seong Rae Lee, Dong Hwan Kim, Seok Nam-Kung, Tae Suk Jang

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23 Citations (Scopus)

Abstract

Magnetic and microstructural properties of (Nd26.06, Dy 6.51)-Febal.-B0.97-M2.39 (wt.%) (M = Cu, Al, Co, and Nb) sintered magnets doped with Dy2 O3 and DyF3 powders were studied. In the case of the Dy 2O3-doped magnet, Dy was distributed along the near grain boundaries. In contrast, the DyF3-doped magnet and the undoped magnet showed that Dy was distributed uniformly in the main phase. The coercivity and the remanence of the Dy2 O3 and DyF3 -doped magnets were 33.2 kOe, 11.64 kG, and 34.5 kOe, 11.21 kG, respectively. The coercivity of the DyF3-doped magnet was the largest but its remanence was the smallest among other magnets because the Dy was distributed throughout the main phase. Uniform distribution of the Dy in the DyF3-doped magnet was probably due to their lower bonding energy and higher chemical potential for diffusion.

Original languageEnglish
Article number6027997
Pages (from-to)3259-3262
Number of pages4
JournalIEEE Transactions on Magnetics
Volume47
Issue number10
DOIs
Publication statusPublished - 2011 Oct 1

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Keywords

  • DyO
  • DyF doping
  • magnetic property
  • microstructure
  • Nd-Fe-B sintered magnets

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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