Magnetic and Thermal Properties of Fe73.5Si13.5B9Cu1Nb3 Amorphous Ribbon and Ball-Milled Powders

  • Shih Fan Chen Institute of Materials Science and Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
  • Shih Hang Huang Institute of Materials Science and Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
  • Shea Jue Wang Institute of Materials Science and Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
  • Shih Hsun Chen Department of Energy Engineering, National United University, 1, Lienda, Miaoli 36003, Taiwan
  • Chien Chon Chen Department of Energy Engineering, National United University, 1, Lienda, Miaoli 36003, Taiwan
Keywords: Amorphous ribbon, Fe-Si-B-Cu-Nb alloy, Magnetism, Phase transformation, Powder

Abstract

This paper reports magnetic and thermal properties of Fe73.5Si13.5B9Cu1Nb3 amorphous ribbon and its powders prepared by ball milling. Differential thermal analysis of the amorphous ribbon showed its Curie temperature at 400 °C, and two crystalline peaks at 500 and 550 °C, respectively. X-ray diffraction analysis demonstrated that a secondary phase Fe2B appeared at 500 °C, causing a maximum strain of 0.195 % in the ribbon at 600 °C. The optimized soft magnetic properties of Fe73.5Si13.5B9Cu1Nb3 ribbon were found in the sample annealed at 450 °C, with saturation magnetization Bm = 1.84×104 G and coercivity Hc = 17.95 Oe. After ball milling, the Fe73.5Si13.5B9Cu1Nb3 powders reached a mean particle size of 10 μm, with partial crystallization during the ball milling process. The ball milling decreased Bm while increased Hc, due to anisotropy induced by stress.

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Published
2017-06-14
Section
ARTICLES