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

Volume

32

Issue

5

fYear

1996

fDate

9/1/1996 12:00:00 AM

Firstpage

4866

Lastpage

4871

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 (μ_c) at 1 kHz in as-quenched state are 1.07 T, 12.7 A/m and 3600, respectively, for Fe₇₃Al₅Ga₂P₁₁C₅B₄ and 1.14 T, 0.5 A/m and 3200, respectively for Fe₇₂Al₅Ga₂P₁₀C₆B₄Si₁. 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; Fe₇₂Al₅Ga₂P₁₀C₆B₄Si; Fe₇₃Al₅Ga₂P₁₁C₅B₄; 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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.539178

Filename

539178