• DocumentCode
    1258920
  • Title

    Enhancement of coercivity in high remanence HDDR Nd-Fe-B powders

  • Author

    Nakamura, H. ; Kato, K. ; Book, D. ; Sugimoto, S. ; Okada, M. ; Homma, M.

  • Author_Institution
    Dept. of Mater. Sci., Tohoku Univ., Sendai, Japan
  • Volume
    35
  • Issue
    5
  • fYear
    1999
  • fDate
    9/1/1999 12:00:00 AM
  • Firstpage
    3274
  • Lastpage
    3276
  • Abstract
    A new type of HDDR (Hydrogenation, Disproportionation, Desorption, Recombination) processing route, in which alloys are heated up under a low pressure of H2 for the disproportionation stage, was found to be an effective way of obtaining high remanence Nd-Fe-B ternary powders, with no large decrease in coercivity (which was the problem with the previous HDDR processing route, in which the alloys were heated under vacuum), The alloys with 0.5% Ga addition exhibited high coercivities of 1.0 MAm-1 with no degradation in remanence (Br=1.4 T),
  • Keywords
    boron alloys; coercive force; heat treatment; iron alloys; materials preparation; neodymium alloys; permanent magnets; powders; remanence; Ga addition effects; Nd-Fe-B; Nd-Fe-B-Ga; coercivity enhancement; high remanence HDDR powders; hydrogenation/disproportionation/desorption/recombination processing; Anisotropic magnetoresistance; Coercive force; Degradation; Heat engines; Heat treatment; Hydrogen; Magnetic properties; Powders; Pulse measurements; Remanence;
  • fLanguage
    English
  • Journal_Title
    Magnetics, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9464
  • Type

    jour

  • DOI
    10.1109/20.800496
  • Filename
    800496
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1258920