Magnetic properties and stabilities of (Nd0.76, Pr0.24)-Fe-B HDDR powders and injection-molded bonded magnets made from them

Koichiro Morimoto, Kuniyoshi Shigeoka, Nobuhiro Katayama, Rina Takizawa, Masaru Itakura

研究成果: ジャーナルへの寄稿記事

抄録

The effects of replacing Nd by rare-earth mixture Nd0.76Pr0.24, which is equivalent to didymium, and hydrogen desorption rate at the early stage of desorption-recombination process on magnetic properties of HDDR Nd-Fe-B powders were studied. It was found that the Pr-substituted powder produced by a very slow desorption speed exhibits the same coercivity HcJ and approximately 8% higher remanence Br compared with the powder of pure Nd system prepared by the conventional desorption speed. Although corrosion resistance of the Pr-substituted powder is slightly inferior to that of the pure Nd system powder, it was confirmed that the Pr substitution does not strongly affect irreversible flux losses of the injection-molded bonded magnet fabricated from the powder after exposure to air at 100°C. These results indicate that didymium can be used as an alternative of the pure Nd to produce the HDDR powders. It is also expected that the usage of didymium can reduce the material cost eliminating the process for the separation of the rare-earth elements.

元の言語英語
ページ(範囲)1047-1052
ページ数6
ジャーナルFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
63
発行部数13
DOI
出版物ステータス出版済み - 12 1 2016

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Powders
Magnets
Magnetic properties
Desorption
Remanence
Coercive force
Rare earth elements
Rare earths
Corrosion resistance
Hydrogen
Substitution reactions
Fluxes
Air
Costs

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

これを引用

Magnetic properties and stabilities of (Nd0.76, Pr0.24)-Fe-B HDDR powders and injection-molded bonded magnets made from them. / Morimoto, Koichiro; Shigeoka, Kuniyoshi; Katayama, Nobuhiro; Takizawa, Rina; Itakura, Masaru.

:: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, 巻 63, 番号 13, 01.12.2016, p. 1047-1052.

研究成果: ジャーナルへの寄稿記事

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