철계 비정질/나노 결정 하이브리드 소재의 연자성 특성 (Soft Magnetic Properties of Fe-based Amorphous/Nanocrystalline Hybrid Materials)

서지정보

· 발행기관 : 대한금속·재료학회
· 수록지 정보 : 대한금속·재료학회지 / 55권 / 5호 / 328 ~ 334페이지
· 저자명 : 이연주, 전종규, 장태석, 이민우, 김용진, 양동열, 이미정, 최현주

초록

In this study, the effect of the crystalline structure on the magnetic properties of Fe-based amorphous powder is investigated. The Fe-B-P-C-Nb-Hf amorphous powder with excellent soft magnetic properties is prepared via gas-atomization, and the atomized amorphous powder is annealed in order to generate a small amount of nanosized crystallites in the amorphous matrix. For the powder annealed at 375 ℃, the coercivity is decreased by 96.15% from 3632.68 to 139.89 A/m, and the magnetization is increased 19.04% from 0.192 to 0.229 Wbm/g. For the powder annealed at 425 ℃, the coercivity is decreased 95.14% to 176.72 A/m and the magnetization is increased 0.71% to 0.193 Wbm/g. The simultaneous enhancement of the coercivity and magnetization can be attributed to the generation of a small amount of nanosized crystallites and the release of the residual stresses.

영어초록

In this study, the effect of the crystalline structure on the magnetic properties of Fe-based amorphous powder is investigated. The Fe-B-P-C-Nb-Hf amorphous powder with excellent soft magnetic properties is prepared via gas-atomization, and the atomized amorphous powder is annealed in order to generate a small amount of nanosized crystallites in the amorphous matrix. For the powder annealed at 375 ℃, the coercivity is decreased by 96.15% from 3632.68 to 139.89 A/m, and the magnetization is increased 19.04% from 0.192 to 0.229 Wbm/g. For the powder annealed at 425 ℃, the coercivity is decreased 95.14% to 176.72 A/m and the magnetization is increased 0.71% to 0.193 Wbm/g. The simultaneous enhancement of the coercivity and magnetization can be attributed to the generation of a small amount of nanosized crystallites and the release of the residual stresses.

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