• DocumentCode
    1078054
  • Title

    Fully dense bulk nanocomposites of (Sm1-xGdx)2(Co1-yFey)17+(Co, Fe) with high coercivity and high Curie temperature

  • Author

    Chen, Christina H. ; Lee, Don ; Liu, Sam ; Walmer, Michael H. ; Zhang, Yong ; Hadjipanayis, George C.

  • Author_Institution
    Univ. of Dayton, OH, USA
  • Volume
    40
  • Issue
    4
  • fYear
    2004
  • fDate
    7/1/2004 12:00:00 AM
  • Firstpage
    2937
  • Lastpage
    2939
  • Abstract
    Fully dense nanocomposites of (Sm1-xGdx)2(Co1-yFey)2:17 phase + Co/Fe were obtained by hot pressing the amorphous powders at 740°-760°C. Amorphous powders were made by mechanical alloying. Up to 14 kOe of Coercivity was obtained for these Cu and Zr free nanocomposites. X-ray diffraction patterns confirm the status of amorphous powder and crystallized structure after annealing at 750-825°C. Transmission electron microscopy image shows that the sizes of crystals were in the range of several nm to 100 nm. These fully dense nanocomposites have Curie temperatures higher than 900°C and lower temperature coefficient of magnetization, which would make them ideal candidates for temperature compensated permanent magnets.
  • Keywords
    Curie temperature; X-ray diffraction; amorphous magnetic materials; cobalt alloys; coercive force; gadolinium alloys; iron alloys; magnetic annealing; nanostructured materials; permanent magnets; pressing; samarium alloys; transmission electron microscopy; (Sm1-xGdx)2(Co1-yFey)17-(CoFe); 740 to 760 C; 750 to 825 C; Curie temperature; X-ray diffraction patterns; amorphous powders; annealing; coercivity; crystal size; crystallized structure; hot pressing; mechanical alloying; nanocomposites magnets; permanent magnets; rare earth magnets; transmission electron microscopy; Alloying; Amorphous materials; Coercive force; Crystallization; Iron; Nanocomposites; Powders; Pressing; Temperature; Zirconium; Curie temperature; Sm–Co rare earth magnets; full density; nanocomposites magnets; temperature coefficient;
  • fLanguage
    English
  • Journal_Title
    Magnetics, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9464
  • Type

    jour

  • DOI
    10.1109/TMAG.2004.830398
  • Filename
    1325691
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1078054