Title :
Dependence of the magnetic properties of Zn bonded Sm2Fe 17Nx magnets on the particle size distribution
Author :
Wall, B. ; Katter, M. ; Rodewald, W. ; Velicescu, M.
Author_Institution :
Vacuumschmelze GmbH, Hanau, Germany
fDate :
3/1/1994 12:00:00 AM
Abstract :
By adjusting the particle size distribution of the Sm2Fe17 alloy-powder the density of cold isostatically pressed (p=200 MPa) magnets as well as of die-pressed (p=600 MPa) magnets could be improved up to 72% of the theoretical density. A remanent polarization and a coercivity of 0.77 T and 10.8 kA/cm could be achieved for Zn-bonded magnets containing 5 wt.% Zn. The temperature coefficients of Zn-bonded Sm2Fe17N3 magnets are superior compared to polymer-bonded Nd-Fe-B magnets and amount to α(Jr)=-6.06%/K and α(HcJ)=-0.36%/K
Keywords :
coercive force; ferromagnetic properties of substances; iron alloys; permanent magnets; remanence; samarium alloys; 0.77 T; Sm2Fe17N; Sm2Fe17Nx; Zn bonded; coercivity; particle size distribution; remanent polarization; Bonding; Coercive force; Iron alloys; Magnetic properties; Magnets; Polarization; Polymers; Samarium alloys; Temperature; Zinc;
Journal_Title :
Magnetics, IEEE Transactions on
