Title :
Improvement of the density of metal-bonded Sm2Fe17 Nx (x≈3) magnets
Author :
Velicescu, M. ; Wall, B. ; Rodewald, W. ; Reppel, G.W.
Author_Institution :
Vacuumschmelze GmbH, Hanau, Germany
fDate :
11/1/1993 12:00:00 AM
Abstract :
Different routes for the comparison of Sm2Fe17 Nx alloy-powders are investigated. By addition of 2 to 5 wt.% Bi or Wood´s alloy-powders metal-bonded magnets with densities of about 6 g/cm3 are obtained. The magnetic properties are not significantly improved. Compaction of a 25-40 μm Sm2Fe17Nx alloy-powder fraction with 15 wt.% Zn results in a density of 5.8 g/cm3; the maximum energy density of such magnets amounts to 68 kJ/m3. The density of Zn-compacted magnets produced from nitrogenated jet-milled Sm2Fe17 alloy-powders amounts only to 4.8 g/cm3, but an energy density of 64 kJ/m3 could be achieved
Keywords :
densification; density of solids; ferromagnetic properties of substances; iron alloys; permanent magnets; powder metallurgy; samarium alloys; 25 to 40 micron; Sm2Fe17Nx-Zn-Bi; Wood´s alloy-powders; Zn-compacted magnets; alloy-powders; density; magnetic properties; magnets; maximum energy density; metal-bonded Sm2Fe17Nx; nitrogenated jet-milled Sm2Fe17 alloy-powders; Anisotropic magnetoresistance; Bismuth; Compaction; Iron; Magnetic properties; Magnets; Powders; Samarium; Temperature; Zinc;
Journal_Title :
Magnetics, IEEE Transactions on
