Title :
Magnetic properties and microstructure of rapidly quenched SmZrFeCoN magnets
Author :
Kawashima, F. ; Sakurada, S. ; Sawa, T. ; Arai, T. ; Tsutai, A. ; Sahashi, M.
Author_Institution :
R&D Center, Toshiba Corp., Kawasaki, Japan
fDate :
9/1/1999 12:00:00 AM
Abstract :
Dependence of magnetic properties and microstructure on boron additions for nitrogenated (Sm,Zr)(Fe,Co)9 alloys fabricated by rapidly quenching was investigated. The condition for getting high (BH)max with high iHc is to produce an amorphous phase in the rapidly quenched sample because it leads to the precipitation of uniform and fine grains by the annealing above their crystallization temperature. The role of boron is to form the amorphous phase easily by rapidly quenching. High (BH)max of about 20 MGOe with high iHc of 9.6 kOe was obtained for nitrogenated (Sm0.7Zr0.3)(Fe0.95Co0.05) 9B0.1. High (BH)max of 13.0 MGOe was also attained as an isotropic resin bonded magnet with density of 6.2 g/cm3
Keywords :
alloying additions; boron alloys; cobalt alloys; crystal microstructure; ferromagnetic materials; iron alloys; permanent magnets; rapid solidification; samarium alloys; zirconium alloys; (Sm0.7Zr0.3)(Fe0.95Co0.05)9B0.1; SmZrFeCoN; amorphous phase; boron additions; isotropic resin bonded magnet; magnetic properties; microstructure; nitrogenated (Sm,Zr)(Fe,Co)9 alloys; precipitation; rapidly quenched SmZrFeCoN magnets; Amorphous materials; Annealing; Boron alloys; Crystallization; Iron; Magnetic properties; Microstructure; Resins; Temperature; Zirconium;
Journal_Title :
Magnetics, IEEE Transactions on
