Title :
Nanocrystalline and nanocomposite SmCo2Fe2B magnets
Author :
Gong, Wei ; Hadjipanayis, G.C.
Author_Institution :
Dept. of Phys. & Astron., Delaware Univ., Newark, DE, USA
fDate :
9/1/1996 12:00:00 AM
Abstract :
The magnetic and structural properties of SmCo2Fe2 B powders prepared by ball alloying and melt-spinning have been studied. Powders milled for 5 minutes and then aligned were found to be anisotropic by X-ray diffraction. An optimum coercivity of, Hc=13.5 kOe, was obtained after corresponding to a particle size. Mechanically alloyed powders were shown to have the highest coercivity, 16 kOe, after heat-treating at 600°C for 30 minutes. The melt-spun samples had a low coercivity due to an unidentified phase possibly with low anisotropy
Keywords :
X-ray diffraction; boron alloys; cobalt alloys; coercive force; crystal structure; ferromagnetic materials; iron alloys; mechanical alloying; nanostructured materials; particle size; permanent magnets; powder metallurgy; samarium alloys; 120 min; 30 min; 5 min; 600 C; SmCo2Fe2B; X-ray diffraction; anisotropic; ball alloying; melt-spinning; nanocomposite SmCo2Fe2B magnets; nanocrystalline magnets; optimum coercivity; Anisotropic magnetoresistance; Coercive force; Iron; Magnetic anisotropy; Magnets; Milling; Perpendicular magnetic anisotropy; Powders; Saturation magnetization; X-ray diffraction;
Journal_Title :
Magnetics, IEEE Transactions on
