Production of thick high-performance sintered neodymium magnets by grain boundary diffusion treatment with dysprosium-nickel-aluminum alloy

Naoko Oono, Masato Sagawa, Ryuta Kasada, Hideki Matsui, Akihiko Kimura

Research output: Contribution to journalArticle

83 Citations (Scopus)

Abstract

A novel grain boundary diffusion (GBD) treatment with a DyNiAl eutectic alloy powder allowed Dy to penetrate into sintered plates of NdFeB magnet as thick as 5 mm. The coercivity of the magnet was increased from a value of 1160 kA/m (14.5 kOe) to 1760 kA/m (22 kOe). This was achieved without any marked decrease in remanance and with a high squareness.

Original languageEnglish
Pages (from-to)297-300
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Volume323
Issue number3-4
DOIs
Publication statusPublished - 2011 Feb 1
Externally publishedYes

Keywords

  • Dy addition
  • Grain boundary diffusion treatment
  • Improved coercivity
  • Sintered NdFeB

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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