• DocumentCode
    1385675
  • Title

    The effect of Fe on the temperature dependent magnetic properties of Sm(Co,Fe,Cu,Zr)z and SmCo5 sintered magnets at 450°C

  • Author

    Ma, B.M. ; Liang, Y.L. ; Patel, J. ; Scott, D. ; Bounds, C.O.

  • Author_Institution
    Rhone-Poulenc, Rare Earths & Gallium, Cranbury, NJ, USA
  • Volume
    32
  • Issue
    5
  • fYear
    1996
  • fDate
    9/1/1996 12:00:00 AM
  • Firstpage
    4377
  • Lastpage
    4379
  • Abstract
    The magnetic properties of SmCo5, Sm(Cobal.Fe0.21Cu0.06Zr0.03) 7.6, Sm(CobalFe0.25Cu0.06Zr 0.03)7.6, Sm(CobalFe0.28Cu 0.06Zr0.02)7.6, sintered magnets have been measured up to 350, 400 and 450°C. For a fixed temperature range, the irreversible loss of Sm(Co,Fe,Cu,Zr)z magnets has been found to increase with increasing Fe content, Despite the high B, obtained at 25°C, a magnet must have a low irreversible loss of induction to retain a high magnetization after thermal cycling. Compromising the Br of 11.3 kG obtained at 25°C and the irreversible loss of 1.9% after thermal cycling to 450°C, a magnet with the composition of the Sm(Cobal.Fe0.21Cu0.6Zr0.03) 7.6 was found to exhibit the highest retained magnetization among the magnets studied. This magnet also exhibited the highest Hci (2.8 kOe) and BHmax (6.7 MGOe) at 450°C among all magnets studied. The reversible temperature coefficients of induction of Sm(Co,Fe,Cu,Zr)2 sintered magnets were found to be about -0.03 to -0.04%/°C, while those of SmCo5 magnet were about 0.05%/°C
  • Keywords
    cobalt alloys; copper alloys; demagnetisation; ferromagnetic materials; iron alloys; magnetic leakage; permanent magnets; samarium alloys; sintering; zirconium alloys; (null); 25 C; 350 C; 400 C; 450 C; Sm(Co,Fe,Cu,Zr)z sintered magnets; Sm(Cobal.Fe0.21Cu0.06Zr0.03 )7.6; Sm(CobalFe0.25Cu0.06Zr0.03 )7.6; Sm-Co-Fe-Cu-Zr; SmCo5; SmCo5 sintered magnets; irreversible loss; reversible temperature coefficients of induction; temperature dependent magnetic properties; thermal cycling; Iron; Loss measurement; Magnetic losses; Magnetic properties; Magnetization; Magnets; Samarium; Temperature dependence; Temperature distribution; Temperature measurement;
  • fLanguage
    English
  • Journal_Title
    Magnetics, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9464
  • Type

    jour

  • DOI
    10.1109/20.538874
  • Filename
    538874
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1385675