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

doi:10.2320/matertrans.M2014273

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

ENG - Materials Science

Research output: Contribution to journal › Article › peer-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 (T_HD) varied from 0.27 to 0.55 μ m, and decreased as T_HD was lowered. The ultrafine powder of the HDDR alloy became finer as T_HD decreased, with sizes in the range of 0.33 to 0.58 μ m.

Original language	English
Pages (from-to)	129-134
Number of pages	6
Journal	Materials Transactions
Volume	56
Issue number	1
DOIs	https://doi.org/10.2320/matertrans.M2014273
Publication status	Published - 2014

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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10.2320/matertrans.M2014273

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Effects of hydrogenation-disproportionation-desorption-recombination processing parameters on the particle size of ultrafine jet-milled Nd-Fe-B powders. / Nakamura, Michihide; Matsuura, Masashi ; Tezuka, Nobuki ; Sugimoto, Satoshi; Une, Yasuhiro; Kubo, Hirokazu; Sagawa, Masato.

In: Materials Transactions, Vol. 56, No. 1, 2014, p. 129-134.

Research output: Contribution to journal › Article › peer-review

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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.",

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author = "Michihide Nakamura and Masashi Matsuura and Nobuki Tezuka and Satoshi Sugimoto and Yasuhiro Une and Hirokazu Kubo and Masato Sagawa",

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AU - Nakamura, Michihide

AU - Matsuura, Masashi

AU - Tezuka, Nobuki

AU - Sugimoto, Satoshi

AU - Une, Yasuhiro

AU - Kubo, Hirokazu

AU - Sagawa, Masato

PY - 2014

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AB - 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.

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KW - Ultra fine neodymium-iron-boron powders

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

Abstract

Keywords

ASJC Scopus subject areas

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