Coercivity enhancement of anisotropic Dy-free Nd-Fe-B powders by conventional HDDR process

K. Morimoto, N. Katayama, Hiroshi Akamine, Masaru Itakura

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Coercivity enhancement of Dy-free Nd-Fe-Co-B-Ga-Zr powders was studied using the conventional hydrogenation-decomposition-desorption-recombination (HDDR) process. It was found that the addition of Al together with the proper Nd content and the slow hydrogen desorption of the HDDR treatment can induce high coercivity in the powder. For example, the 14.0 at% Nd-2.0 at% Al powder exhibits H cJ of 1560 kA/m, B r of 1.22 T, and (BH) max of 257 kJ/m 3. The high coercivity inducement of the powder is thought to be attributed to the formation of Nd-rich phase, which continuously surrounds fine Nd 2Fe 14B grains.

Original languageEnglish
Pages (from-to)3723-3726
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Volume324
Issue number22
DOIs
Publication statusPublished - Nov 1 2012

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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