Effect of temperature and pressure conditions on phase evolution and magnetic anisotropy in d-HDDR process for Nd-Fe-B powders

T. Horikawa, M. Matsuura, S. Sugimoto, M. Yamazaki, C. Mishima

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

It is well-known that by applying the HDDR (hydrogen disproportionation desorption recombination) treatment to Nd-Fe-B powders, the resultant powders show magnetic anisotropy and such an anisotropic powders are useful to fabricate high performance bonded magnets. The degree of magnetic anisotropy of HDDR-treated Nd-Fe-B powders varies depending on the temperature and hydrogen pressure (PH2) during the treatment and also in d(dynamic)-HDDR method there is an optimal condition which maximizes the anisotropy.[1,2] Many researchers have been tried to reveal the origin of this anisotropy, however, it is still unclear. In the present study, to clarify the mechanism of the induction of magnetic anisotropy, the relationship between the d-HDDR condition and the properties of obtained samples was investigated from the aspect of both the evolution in phases and the crystal structure.

Original languageEnglish
Title of host publication2015 IEEE International Magnetics Conference, INTERMAG 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479973224
DOIs
Publication statusPublished - 2015 Jul 14
Event2015 IEEE International Magnetics Conference, INTERMAG 2015 - Beijing, China
Duration: 2015 May 112015 May 15

Publication series

Name2015 IEEE International Magnetics Conference, INTERMAG 2015

Other

Other2015 IEEE International Magnetics Conference, INTERMAG 2015
CountryChina
CityBeijing
Period15/5/1115/5/15

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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