Title :
The relationship of microstructure and magnetic properties in cold-rolled 6.5% Si-Fe alloy
Author :
Bi, X.F. ; Tanaka, Y. ; Sato, K. ; Arai, K.I. ; Ishiyama, K. ; Yamashiro, Y.
Author_Institution :
Res. Inst. of Electr. Commun., Tohoku Univ., Sendai, Japan
fDate :
9/1/1996 12:00:00 AM
Abstract :
The effect of microstructures on the magnetic properties in the 6.5% Si-Fe alloy was studied. The alloy was subjected to two patterns of heat treatments, and the microstructures were observed by means of TEM. The alloy after an appropriate treatment has shown excellent soft magnetic properties, with the maximum permeability of 7.25×104 and the core loss W10/50 of 0.39 W/kg. The corresponding microstructure was characterized by the extremely fine domains of DO3 order phase existing in B2 order phase. However, the coarsening of the DO3 domains was found to reduce the maximum permeability and increase the core loss of the alloy. It is suggested that the coarsening of the DO3 domains be accompanied with the formation of magnetic contrast around the boundary of the DO3 and B2 phases. Therefore, it is assumed that the phase boundary tends to oppose the displacement of magnetic domain walls due to the existence of the magnetic contrast
Keywords :
cold rolling; crystal microstructure; ferromagnetic materials; heat treatment; iron alloys; magnetic domain walls; magnetic permeability; silicon alloys; soft magnetic materials; transmission electron microscopy; B2 order phase; DO3 order phase; Si-Fe; TEM; cold-rolled alloy; core loss; domain coarsening; fine domains; heat treatment; magnetic contrast; microstructure; permeability; soft magnetic properties; Core loss; Heat treatment; Magnetic domain walls; Magnetic domains; Magnetic properties; Magnetostriction; Microstructure; Permeability; Saturation magnetization; Soft magnetic materials;
Journal_Title :
Magnetics, IEEE Transactions on
