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Microstructure, crystallization behavior, and soft magnetic properties of Co-doped Finemet-type nanocrystalline alloys

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Abstract

(Fe74Si15B7Cu1Nb3)100−xCox (x = 0, 2, 4, 6, 8, and 10) nanocrystalline alloys prepared by melt spinning were investigated. The results indicate that the saturation magnetic flux density (Bs) of these alloys could be efficiently enhanced from 1.29 to 1.40 T, accompanying with good soft magnetic properties. Glass-forming ability of these alloys decreased with increasing Co content, whereas the temperature interval (ΔTx = Tx2 − Tx1) increased significantly. The coercivity (Hc) of these alloys almost keep constant in a wide annealing temperature range. Crystallization kinetics shows that the activation energy of the alloy decreases with the increment of Co content, implying the nucleation and growth of α-Fe(Co) grains become easier. Microstructural analysis indicates that the mean grain size of the α-Fe(Co) grains increases gradually with increasing Co content. Irregular and disorder domain walls observed on the ribbon surface may originate from the pinning effects of surface crystallites, resulting in the deterioration of soft magnetic properties.

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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Funding

This work was supported by the National Natural Science Foundation of China (Grant No. 51971093) and the National Key R&D Program of China (Grant Nos. 2021YFB3802900 and 2022YFB2404102).

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Authors and Affiliations

  1. Advanced Technology and Materials Co., Ltd, China Iron and Steel Research Institute Group, Beijing, 100081, China

    Yanxing Xing & Shaoxiong Zhou

  2. Jiangsu JITRI Advanced Energy Materials Research Institute Co., Ltd, Changzhou, 213034, Jiangsu, China

    Yanxing Xing, Bangshao Dong, Shaoxiong Zhou & Hongxiang Cui

  3. Institute of Advanced Materials, North China Electric Power University, Beijing, 102206, China

    Bangshao Dong & Shaoxiong Zhou

  4. School of Mechanical and Electrical Engineering, Shandong University (Weihai), Weihai, 264209, China

    Hongxiang Cui & Li Wang

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  1. Yanxing Xing
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  4. Hongxiang Cui
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  5. Li Wang
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Contributions

All authors contributed to the study conception and design. Material preparation was performed by YX and HC. Data collection, data analysis, and novelty were directed by YX, SZ, and BD. The first draft of the manuscript was written by YX and all authors commented on the previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Bangshao Dong or Shaoxiong Zhou.

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Xing, Y., Dong, B., Zhou, S. et al. Microstructure, crystallization behavior, and soft magnetic properties of Co-doped Finemet-type nanocrystalline alloys. J Mater Sci: Mater Electron 34, 1496 (2023). https://doi.org/10.1007/s10854-023-10816-w

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