Effects of hydrogenation-disproportionation-desorption-recombination processing parameters on the particle size of ultrafine jet-milled Nd-Fe-B powders

Michihide Nakamura, Masashi Matsuura, Nobuki Tezuka, Satoshi Sugimoto, Yasuhiro Une, Hirokazu Kubo, Masato Sagawa

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The effects of variations in the hydrogenation-disproportionation-desorption-recombination (HDDR) processing parameters on the size of Nd-Fe-B ultrafine powders were investigated. The ultrafi ne powders were fabricated by hydrogen decrepitation and jet milling of the HDDR alloys. Before pulverization, the crystal grain size of the HDDR alloys obtained by changing the HD processing temperature (THD) varied from 0.27 to 0.55 μ m, and decreased as THD was lowered. The ultrafine powder of the HDDR alloy became finer as THD decreased, with sizes in the range of 0.33 to 0.58 μ m.

Original languageEnglish
Pages (from-to)129-134
Number of pages6
JournalMaterials Transactions
Volume56
Issue number1
DOIs
Publication statusPublished - 2014 Jan 1

Keywords

  • Helium jet mill
  • Hydrogenation-disproportionation-desorption-recombination
  • Ultra fine neodymium-iron-boron powders

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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