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Compositional Dependence of Thermal Stability and Soft Magnetic Properties for Fe-Al-Ga-P-C-B Glassy Alloys

Published online by Cambridge University Press:  10 February 2011

T. Mizushima ,
A. Makino ,
S. Yoshida  and
A. Inoue
T. Mizushima
Affiliation:
Central Res. Lab., Alps Electric Co., Ltd., 1–3-5 Higashitakami, Nagaoka 940–8572, Japan, mizushim@alps.co.jp
A. Makino
Affiliation:
Central Res. Lab., Alps Electric Co., Ltd., 1–3-5 Higashitakami, Nagaoka 940–8572, Japan, mizushim@alps.co.jp
S. Yoshida
Affiliation:
Central Res. Lab., Alps Electric Co., Ltd., 1–3-5 Higashitakami, Nagaoka 940–8572, Japan, mizushim@alps.co.jp
A. Inoue
Affiliation:
A. Inoue, Inst. for Materials Res., Tohoku University, 2–1-1 Katahira, Aoba-ku, Sendai 980–77, JAPAN.
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Abstract

Structure, glass forming ability and soft magnetic properties for Fe-Al-Ga-P-C-B glassy alloy system were investigated in the compositional range of Fe from 69 to 78 at%, (Al+Ga) from 2 to 12 and (P+C+B) from 17 to 28. The saturation magnetization (σ5) rises gradually with increase of Fe concentration. The maximum value of 70K for supercooled liquid region (ΔTx=Tx-Tg, Tx: crystallization temperature, Tg: glass transition temperature:) and the maximum thickness of 180 μm for glass formation (tmax,) are found in the composition range around Fe=70at% and (Al+Ga)=7at%. The highest permeability (μc) of 20,000 at 1kHz and the lowest coercive force (Hc) of 2 A/m at the sample thickness of 30 μm can be also obtained at this composition. It was ascertained that the composition regions to yield the maximum glass forming ability and lowest magnetostriction were in agreement with that in which the most excellent soft magnetic properties were yielded. This results allow us to assume that the excellent soft magnetic properties for this glassy alloy system in the limited composition range are presumably due to high structural homogeneity resulting from significantly high glass-forming ability.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 554: Symposium MM – Bulk Metallic Glasses , 1998 , 155
Copyright
Copyright © Materials Research Society 1999

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