Thermal stability and magnetic properties of Fe-Al-Ga-P-C-B-Si amorphous thick sheets
- Alps Electric Co. Ltd., Nagaoka (Japan). Central Research Lab.
- Tohoku Univ., Sendai (Japan). Inst. for Materials Research
The structure and magnetic properties of melt-spun multicomponent Fe{sub 72}Ga{sub 2}Al{sub 5}P{sub 11{minus}x}C{sub 6}B{sub 4}Si{sub x} (x = 0-10) alloy sheets were investigated. The increases in the thermal stability and glass forming ability, and the improvement of the soft magnetic properties were recognized with the replacement of P by 1--2 at% Si. The supercooled liquid region ({Delta}T{sub x}) defined by the difference between crystallization temperature (T{sub x}) and glass transition temperature (T{sub g}) increases from 51 K for the Fe{sub 72}Al{sub 5}Ga{sub 2}P{sub 11}C{sub 6}B{sub 4} alloy to 65 K for the Fe{sub 72}Al{sub 5}Ga{sub 2}P{sub 9}C{sub 6}B{sub 4}Si{sub 2} alloy. The increases in {Delta}T{sub x} and t{sub max} are presumably because of increased agreement with three empirical rules for glass formation. The soft magnetic properties at the thickness of over 70 {micro}m are also improved by the replacement of 1--2 at% Si. The magnetic properties for the Fe{sub 72}Al{sub 5}Ga{sub 2}P{sub 9}C{sub 6}B{sub 4}Si{sub 2} amorphous alloy with the thickness of 190 {micro}m after optimum annealing (623 K {times} 1.8 ks) are 169 {times} 10{sup {minus}6} Wbmkg{sup {minus}1} for saturation magnetization ({sigma}{sub s}), 1.0 A/m for coercive force (H{sub c}), and 9,000 for permeability ({mu}{sub e}) at 1 kHz. It is therefore expected that the Fe-based amorphous alloy containing 2 at% Si is widely used as a bulk amorphous material with good soft magnetic properties.
- OSTI ID:
- 566396
- Report Number(s):
- CONF-970468-; ISSN 0018-9464; TRN: IM9805%%110
- Journal Information:
- IEEE Transactions on Magnetics, Vol. 33, Issue 5Pt2; Conference: 1997 IEEE international magnetics conference (Intermag `97), New Orleans, LA (United States), 1-4 Apr 1997; Other Information: PBD: Sep 1997
- Country of Publication:
- United States
- Language:
- English
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