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논문 기본 정보

저자정보
(Korea Institute of Materials Science) (Korea Institute of Materials Science) (Korea Institute of Materials Science) (Korea Institute of Materials Science) (Pusan National University) (Korea Institute of Materials Science)
저널정보
한국자기학회 Journal of Magnetics Journal of Magnetics Vol.29 No.4
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    초록·키워드

    This study investigated the effects of niobium content on the glass-forming ability, thermal stability, and magnetic properties of Fe82-xSi4B12Nb1+xCu1 (x=0-2) nanocrystalline soft magnetic alloys. X-ray diffraction showed that increasing niobium content enhanced the glass-forming ability by stabilizing the amorphous phase. Amorphous phases were observed in Nb1.5 and Nb2 ribbons, while α-Fe(Si) crystalline peaks were detected in Nb0, Nb0.5, and Nb1 ribbons. Differential scanning calorimetry demonstrated that T<sub>X1</sub> and T<sub>X2</sub>, and ΔT (T<sub>X2</sub>-T<sub>X1</sub>) increased with higher niobium content, except for Nb2, which showed irregular behavior. Niobium improves thermal stability and widens the annealing window, but excess niobium above 3 at.% limits these effects due to secondary phase formation. Magnetic properties showed decreasing coercivity with higher niobium content. The Nb1.5 ribbon annealed at 510 °C exhibited the lowest coercivity (11.5 A/m) and high permeability (39800). These results emphasize optimizing niobium content to enhance properties in Fe-based nanocrystalline alloys.

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      UCI(KEPA) : I410-151-25-02-092112965