Soft-magnetic Characteristics of Co-based Amorphous Powder Produced by Spinning Water Atomization Process (SWAP)

  • Otsuka, I. (EPSON ATMIX Corporation) ;
  • Wada, K. (EPSON ATMIX Corporation) ;
  • Watanabe, A. (EPSON ATMIX Corporation) ;
  • Kadomura, T. (EPSON ATMIX Corporation) ;
  • Yagi, M. (Energy Electronics Lab., Sojo Univ.)
  • 발행 : 2006.09.24

초록

Co-based amorphous powder was produced by a new atomization process "Spinning Water Atomization Process (SWAP)", having rapid super-cooling rate. The composition of the alloys was ($(Co_{0.95}Fe_{0.05})_{1-x}Cr_x$)$_{75}Si_{15}B_{10}$ (x=0, 0.025, 0.05, 0.075). The powders became the amorphous state even if particle size was up to about $500{\mu}m$. The coercive force of powders was about 0.35 - 0.7 Oe. Furthermore, Co-based amorphous powder cores with glass binders were made by cold-pressing and sintering methods. The initial permeability of the core in the frequency range up to 100 kHz was about 110, and the core loss at 100 kHz for Bm = 0.1 T was $350kW/m^3$.

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