Effects of DyHx and Dy2O3 powder addition on magnetic and microstructural properties of Nd-Fe-B sintered magnets

Kyoung Hoon Bae, Tae Hoon Kim, Seong Rae Lee, Seok Namkung, Tae Suk Jang

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Abstract

The magnetic and microstructural properties of (Nd27.68Dy 4.89)-Febal.B1.0M2.4 (wt. , M Cu, Al, Co, and Nb) sintered magnets doped with Dy2O3 and DyHx powders were studied. The coercivity of the DyH x-doped magnet improved, with no change in the remanence. Well-developed core-shell microstructures were seen in the DyHx-doped magnet, as compared to the case of the Dy2O3-doped magnet. Diffusion of Dy was enhanced in the DyHx-doped magnet, probably because dissolution of hydrogen in Nd2Fe14B increased the lattice parameter. The (00L) grain alignment in the DyH x-doped magnet was also improved.

Original languageEnglish
Article number093912
JournalJournal of Applied Physics
Volume112
Issue number9
DOIs
Publication statusPublished - 2012 Nov 1

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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