Title :
Ti-substituted hard magnetic mechanically alloyed Sm2Fe 17Nx
Author :
Kuhrt, C. ; Schnitzke, K. ; Wecker, J. ; Helmolt, R.V. ; Schultz, L.
Author_Institution :
Siemens AG, Erlangen, Germany
fDate :
11/1/1993 12:00:00 AM
Abstract :
Sm12.6Fe87.4-zTiz with z=2, 3 and 4 elemental powder blends are mechanically alloyed and subsequently two-step heat treated to form hard magnetic microcrystalline Sm-(Fe,Ti)-N. The optimum constitution, i.e., the formation of mainly Sm2(Fe, Ti)17Nx, accompanied by a small fraction of Sm(F,Ti)9Nx, and, particularly, the suppression of α-Fe precipitation, is achieved for 3 at.% Ti. Such material possesses an almost completely step-free hysteresis loop, a remanence of 0.73 T and a coercivity of 16 kA/cm (20 kOe), resulting in a maximum energy product of 90 kJ/m3 (11.2 MGOe) in the powder
Keywords :
coercive force; ferromagnetic properties of substances; heat treatment; iron alloys; magnetic hysteresis; mechanical alloying; permanent magnets; remanence; samarium alloys; titanium alloys; α-Fe precipitation; Sm12.6Fe87.4-zTiz; Sm2Fe17TixNy; Ti-substituted hard magnetic mechanically alloyed Sm2Fe17Nx; coercivity; hard magnetic microcrystalline Sm-(Fe,Ti)-N; maximum energy product; powder blends; remanence; step-free hysteresis loop; two-step heat treated; Alloying; Annealing; Atmosphere; Ball milling; Iron alloys; Magnetosphere; Nitrogen; Powders; Samarium alloys; X-ray scattering;
Journal_Title :
Magnetics, IEEE Transactions on
