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Soft Magnetic Properties of Ring-Shaped Fe-Co-B-Si-Nb Bulk Metallic Glasses

Journal of Magnetics, Volume 16, Number 4, 31 Dec 2011, Pages 431-434

Takayuki Ishikawa (Department of Machine Intelligence and Systems Engineering, Faculty of Systems Science and Technology, Akita Prefectural University), Takahiro Tsubota (Department of Machine Intelligence and Systems Engineering, Faculty of Systems Science and Technology, Akita Prefectural University), Teruo Bitoh *

(Department of Machine Intelligence and Systems Engineering, Faculty of Systems Science and Technology, Akita Prefectural University)

Abstract

The reduction of the Nb content in the (Fe_0.75B_0.20Si_0.05)₉₆Nb₄ bulk metallic glass (BMG) has been studied. The glass-forming ability (GFA) is reduced by decreasing the Nb content, but it can be enhanced by replacing partially Fe by Co. Furthermore, the saturation magnetization of the (Fe_0.8Co_0.2)₇₆B₁₈Si₃Nb₃BMG is 1.35 T, being with 13% larger than that of the base alloy (Fe_0.75B_0.20Si_0.05)₉₆Nb₄ . (Fe_0.8Co_0.2)₇₆B₁₈Si₃Nb₃BMG exhibits slightly larger B₈₀₀ (the magnetic flux density at 800 A/m) and smaller core losses (20%-30%) compared with the commercial Fe-6.5 mass% Si steel.

Keywords: bulk metallic glasses; soft magnetic properties; magnetization; coercivity; permeability; core losses

DOI: http://dx.doi.org/10.4283/JMAG.2011.16.4.431

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