Title :
Soft magnetic properties of bulk Fe-based amorphous alloys prepared by copper mold casting
Author :
Inoue, Akihisa ; Takeuchi, Akira ; Zhang, Tao ; Murakami, Akira ; Makino, Akihiro
Author_Institution :
Inst. of Mater. Res., Tohoku Univ., Sendai, Japan
fDate :
9/1/1996 12:00:00 AM
Abstract :
Fe-based amorphous alloys in Fe-(Al,Ga)-(P,B,C,Si) system were found to exhibit a wide supercooled liquid region exceeding 50 K before crystallization. The high stability of the supercooled liquid enabled the production of cylindrical bulk amorphous alloys with diameters up to 2 mm by copper mold casting. The Fe-based bulk amorphous alloys exhibit ferromagnetism with the Curie temperature of about 600 K. The saturation magnetization (Bs), coercivity (Hc) and permeability (μc) at 1 kHz in as-quenched state are 1.07 T, 12.7 A/m and 3600, respectively, for Fe73Al5Ga2P11 C5B4 and 1.14 T, 0.5 A/m and 3200, respectively for Fe72Al5Ga2P10 C6B4Si1. Besides, the use of the Fe-based amorphous alloys enabled the production of thick amorphous ribbons above 100 μm in thickness and the thick samples also exhibit good soft magnetic properties. The success of synthesizing the bulk Fe-based amorphous alloys with good soft magnetic properties is promising for future development as a new type of soft magnetic materials
Keywords :
Curie temperature; aluminium alloys; amorphous magnetic materials; boron alloys; casting; coercive force; ferromagnetic materials; gallium alloys; iron alloys; magnetic permeability; phosphorus alloys; silicon alloys; soft magnetic materials; 1 kHz; 1.07 T; 1.14 T; 100 mum; 2 mm; 50 K; 600 K; Curie temperature; Fe72Al5Ga2P10C6 B4Si; Fe73Al5Ga2P11C5 B4; amorphous alloys; as-quenched state; coercivity; copper mold casting; ferromagnetism; permeability; saturation magnetization; soft magnetic properties; supercooled liquid region; thick amorphous ribbons; Aluminum alloys; Amorphous materials; Casting; Copper alloys; Crystallization; Gallium alloys; Iron; Magnetic properties; Production; Stability;
Journal_Title :
Magnetics, IEEE Transactions on
