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KMID : 1102020170470010050
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Applied Microscopy
2017 Volume.47 No. 1 p.50 ~ p.54
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Crystalline Behavior and Microstructure Analysis in Fe73.28Si13.43B8.72Cu0.94Nb3.63 Alloy
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Oh Young-Hwa
Kim Yoon-Bae
Seok Hyun-Kwang
Kim Young-Woon
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Abstract
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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 Fe73.28Si13.43B8.72Cu0.94Nb3.63 alloys particles, prepared in 10?4 torr by gas atomization process, were heat treated at 530°C, 600°C, and 670°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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KEYWORD
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Coercive force, Differential thermal analysis, EELS, Selected area diffraction patterns, Niobium
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