Anisotropie Nd2Fe14B-based magnet powder with high remanence produced by modified HDDR process

K. Morimoto, R. Nakayama, K. Mori, K. Igarashi, Y. Ishii, M. Itakura, N. Kuwano, K. Oki

研究成果: Contribution to journalArticle査読

27 被引用数 (Scopus)


The hydrogenatlqn-decompösition-desorptlonrecombination (HDDR) process is a unlqe method to produce anisotropic Ni)2FeuB-hased magnet powder for bonded magnet application. In this study, we studied the effect of appending the intermediate Ar (IA) treatment, Le., hydrogenated materials are annealed under an Ar atmosphere before the evacuation treatment in the HDDR process, on the magnetic properties of magnet powder. It was found that the IA treatment is very effective to enhance magnetic anisotropy of the powder. The optimum magnetic properties of the anisotropic bonded magnet made from the IA treatment processed Nd12.6 FebalCo17.4B6.5Zr0Oa0.3 powder are as follows Br=1.06 T, Hcj=992 ItA/m, and (BH)max=193 kJ/m3.It was observed that the IA treatment induces rapid growth of a -(Fe,Co) grains in the decomposed mixture of the alloy. This microstructural change of the alloy is considered to be strongly related to the preferred crystallographic orientation of the final magnet powder.

ジャーナルIEEE Transactions on Magnetics
5 PART 2
出版ステータス出版済み - 1999

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 電子工学および電気工学


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