• DocumentCode
    1012352
  • Title

    Analytical microscope studies of sintered Nd-Fe-B magnets

  • Author

    Fidler, J.

  • Author_Institution
    Technical University, Karlsplatz, Vienna, Austria
  • Volume
    21
  • Issue
    5
  • fYear
    1985
  • fDate
    9/1/1985 12:00:00 AM
  • Firstpage
    1955
  • Lastpage
    1957
  • Abstract
    Various sintered Nd15Fe77B8permanent magnets supplied by different producers have been examined by analytical electron microscopy. An identical microstructure was found in all of the different magnets. Three phases were detected by means of high resolution electron microscopy, electron diffraction and x-ray microanalysis. Besides the hard magnetic boride phase Nd2Fe14B, a soft magnetic boride phase close to Nd2Fe7B6, and a Nd-rich sintering aid phase (d.h.c.p. structure) were identified. The Nd-rich phase preferentially occurs along grain boundaries as a thin layer with about 10 nm tickness. The soft magnetic phases determine the magnetization reversal and limit the coercivity of sintered Nd-Fe-B magnets.
  • Keywords
    Permanent magnets; Electron microscopy; Iron; Magnetic analysis; Magnetic force microscopy; Microstructure; Neodymium; Permanent magnets; Phase detection; Soft magnetic materials; X-ray detection;
  • fLanguage
    English
  • Journal_Title
    Magnetics, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9464
  • Type

    jour

  • DOI
    10.1109/TMAG.1985.1063992
  • Filename
    1063992
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1012352