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Journal of Materials Science

Erschienen in:

16.02.2021 | Electronic materials

Effect of pre-existing nuclei on microstructure and magnetic properties of high B_s FINEMET-like nanocrystalline alloys

verfasst von: Fushan Bai, Yaqiang Dong, Lei Xie, Qiang Li, Aina He, Xingjie Jia, Jiawei Li, Xinmin Wang

Erschienen in: Journal of Materials Science | Ausgabe 15/2021

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Abstract

The effect of conventional annealing and rapid annealing on the magnetic properties and microstructure of Fe_78+2xSi_7.2-xB_13-xCu_0.8Nb₁ (x = 0, 1, 2) alloys is discussed systematically. The study was found that the existence of a large number of pre-existing nuclei in the amorphous phase of Fe₈₂Si_5.2B₁₁Cu_0.8Nb₁ alloy can produce tiny nanocrystals and thus result in excellent soft magnetic properties. When the average nanocrystal size is 16 nm using rapid annealing, the best soft magnetic performance can be obtained, in which B_s reaches 1.80 T, H_c is 5 A/m, and μ is 20,000 at 1 kHz. The crystallization kinetics shows that as the Fe content increases, the incubation time of nucleation of the alloys decreases, and the nucleation is faster and easier. In addition, a large number of pre-existing crystal nuclei not only greatly reduces the nucleation activation energy of the alloy but also achieves grain refinement and excellent magnetic properties through grain competition growth.

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Titel: Effect of pre-existing nuclei on microstructure and magnetic properties of high Bs FINEMET-like nanocrystalline alloys
verfasst von: Fushan Bai
Yaqiang Dong
Lei Xie
Qiang Li
Aina He
Xingjie Jia
Jiawei Li
Xinmin Wang
Publikationsdatum: 16.02.2021
Verlag: Springer US
Erschienen in: Journal of Materials Science / Ausgabe 15/2021
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI: https://doi.org/10.1007/s10853-021-05861-x

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