Applied Microscopy

Korean Society of Microscopy (한국현미경학회)
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Crystalline Behavior and Microstructure Analysis in Fe73.28Si13.43B8.72Cu0.94Nb3.63 Alloy

  • Oh, Young Hwa (School of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University) ;
  • Kim, Yoon Bae (Center for Bio Materials, Korea Institute of Science and Technology) ;
  • Seok, Hyun Kwang (Center for Bio Materials, Korea Institute of Science and Technology) ;
  • Kim, Young-Woon (School of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University)
  • Received : 2017.03.13
  • Accepted : 2017.03.28
  • Published : 2017.03.30
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Abstract

The microstructure, the crystallization behavior, and magnetic properties of FeSi-based soft magnetic alloys (FINEMET) were investigated using transmission electron microscopy, X-ray diffraction, and coercive force measurements. The amorphous $Fe_{73.28}Si_{13.43}B_{8.72}Cu_{0.94}Nb_{3.63}$ alloys particles, prepared in $10^{-4}$ torr by gas atomization process, were heat treated at $530^{\circ}C$, $600^{\circ}C$, and $670^{\circ}C$ for 1 hour in a vacuum of $10^{-2}$ torr. Nanocrystalline Fe precipitation was first formed followed by the grain growth. Phase formation and crystallite sizes was compared linked to its magnetic behavior, which showed that excellent soft magnetic property can directly be correlated with its microstructure.

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References

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