Journal of Magnetics

The Korean Magnetics Society (한국자기학회)
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Soft Magnetic Properties of Ring-Shaped Fe-Co-B-Si-Nb Bulk Metallic Glasses

  • Ishikawa, Takayuki (Department of Machine Intelligence and Systems Engineering, Faculty of Systems Science and Technology, Akita Prefectural University) ;
  • Tsubota, Takahiro (Department of Machine Intelligence and Systems Engineering, Faculty of Systems Science and Technology, Akita Prefectural University) ;
  • Bitoh, Teruo (Department of Machine Intelligence and Systems Engineering, Faculty of Systems Science and Technology, Akita Prefectural University)
  • Received : 2011.08.11
  • Accepted : 2011.09.15
  • Published : 2011.12.31
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Abstract

The reduction of the Nb content in the $(Fe_{0.75}B_{0.20}Si_{0.05})_{96}Nb_4$ 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 $(Fe_{0.8}Co_{0.2})_{76}B_{18}Si_3Nb_3$ BMG is 1.35 T, being with 13% larger than that of the base alloy $(Fe_{0.75}B_{0.20}Si_{0.05})_{96}Nb_4$. $(Fe_{0.8}Co_{0.2})_{76}B_{18}Si_3Nb_3$ BMG exhibits slightly larger $B_{800}$ (the magnetic flux density at 800 A/m) and smaller core losses (20%-30%) compared with the commercial Fe-6.5 mass% Si steel.

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