Magnetic properties of Nd-Fe-B sintered magnet powders sorbed by Yb metal vapor

Takashi Horikawa, Masahiro Itoh, Ken Ichi Machida

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Ground powders of Nd2Fe14B sintered magnets (particle size = 46-125 μm in diameter) were coated and alloyed by sorbing Yb metal vapor at 550-850°C. A significant recovery of remanence (B r), coercivity (Hcj and maximum energy product ((BH) max) values was observed in the resulting Yb/Nd2Fe 14B powders. The recovered values of 0.98 T, 712kA/m and 173kJ/m 3 for Br, Hcj and (BH)max, respectively, were obtained by optimizing the sorption and annealing conditions (800°C for 90min and 610°C for 60 min, respectively). The effects of temperature and sorption time on the magnetic properties of the recovered powders are discussed based on their microstructural characteristics.

Original languageEnglish
Pages (from-to)L741-L744
JournalJapanese Journal of Applied Physics
Volume42
Issue number7 A
DOIs
Publication statusPublished - 2003 Jul 1

Keywords

  • High-performance permanent magnets
  • Magnetic properties
  • Metal vapor sorption
  • Microstructure
  • NdFeB
  • Rare earth magnets
  • Recovery
  • Sintered magnets
  • Yb metal

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