| Title |
Magnetic Properties of Fe73.5Si13.5B9Cu1Nb3 Soft Magnetic Alloy crystallized in Nitriding-Atmosphere |
| Authors |
이기선(Lee Gi Seon); 박인수(Park In Su); 이기안(Lee Gi An); 김문철(Kim Mun Cheol); 장석훈(Jang Seog Hun) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Amorphous; Crystallization; Nitridation; Nitrides; Nano-crystals; Soft magnet |
| 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. |