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Vol.41, No.11, 786 ~ 791, 2003
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| Title |
| Magnetic Properties of Fe73.5Si13.5B9Cu1Nb3 Soft Magnetic Alloy crystallized in Nitriding-Atmosphere |
| 이기선 Lee Gi Seon , 박인수 Park In Su , 이기안 Lee Gi An , 김문철 Kim Mun Cheol , 장석훈 Jang Seog Hun |
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| Abstract |
| Amorphous Fe_(73.5)Si_(13.5)B_(9)Cu₁Nb₃ alloy was crystallized in nitriding atmosphere of mixture gas of NH₃ and hydrogen. The crystallization at 823K showed the high electrical resistivity ranging from 494 to 538 mW-cm, which was higher level compared with nano-crystalline Fe_(73.5)Si_(13.5)B_(9)Cu₁Nb₃ alloy with a resistivity of about 110 mW-cm. Through the nitridation treatments, the amorphous alloy was transformed into nano-sized crystalline Fe3Si including iron nitrides such as γ` -Fe₄N phases. EPMA-concentration depth profiles confirmed an existence of nitrogen-rich region on the surface of the alloy ribbon, leading to the preferential formation of g -Fe4N phase. The formation of γ` -Fe₄N phase leaded to an increase of the resistivity and provided stable permeability and a low core loss at high frequency. |
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| Key Words |
| Amorphous, Crystallization, Nitridation, Nitrides, Nano-crystals, Soft magnet |
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