Title :
Soft magnetic properties of Fe-B-M-Cu (M=Hf,Zr,Nb) alloys with nanocrystalline and amorphous hybrid structure
Author :
Lee, J.S. ; Kim, K.Y. ; Noh, T.H. ; Kang, I.K. ; Yoo, Y.C.
Author_Institution :
Dept. of Metall. Eng., Inha Univ., Inchon, South Korea
fDate :
11/1/1994 12:00:00 AM
Abstract :
The change in magnetic properties with B content and annealing temperature was investigated for Fe-B-M-Cu (M=Hf,Zr,Nb) alloys. In the high B alloys over 8 at% B, the optimum annealing temperatures revealing the excellent soft magnetic properties were below the crystallization temperatures The annealed microstructure had ultrafine BCC-Fe phase grains with a diameter of 5-7 nm and a considerably high fraction (30-50 vol.%) of interfacial amorphous phase. For these alloys, very low core loss and high effective permeability were obtained in the frequency range up to 1 MHz. These behaviors were interpreted to be due their hybrid microstructure and high electrical resistivity
Keywords :
amorphous magnetic materials; annealing; boron alloys; copper alloys; crystal microstructure; electrical resistivity; ferromagnetic materials; hafnium alloys; iron alloys; magnetic particles; magnetic permeability; nanostructured materials; niobium alloys; soft magnetic materials; zirconium alloys; 1 MHz; Fe-B-M-Cu (M=Hf,Zr,Nb); FeBHfCu; FeBNbCu; FeBZrCu; amorphous hybrid structure; annealing; electrical resistivity; microstructure; nanocrystalline; permeability; ultrafine phase grains; Amorphous materials; Annealing; Core loss; Crystallization; Electric resistance; Frequency; Magnetic properties; Microstructure; Permeability; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
