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Development of FeSiBNbCu Nanocrystalline Soft Magnetic Alloys with High B s and Good Manufacturability

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Abstract

In order to develop Fe-based nanocrystalline soft magnetic alloys with high saturation magnetic flux density (B s) and good manufacturability, the effect of the Nb content on the thermal stability, microstructural evolution and soft magnetic properties of Fe78−x Si13B8Nb x Cu1 (x = 0, 1, 2 and 3) alloys were investigated. It is found that proper Nb addition is effective in widening the optimum annealing temperature range and refining the α-Fe grain in addition to enhancing the soft magnetic properties. For the representative Fe76 Si13B8Nb2Cu1 alloy, the effective annealing time can be over 60 min in the optimal temperature range of 500–600°C. FeSiBNbCu nanocrystalline soft magnetic alloys with desirable soft magnetic properties including high B s of 1.39 T, low coercivity (H c) of 1.5 A/m and high effective permeability (μ e) of 21,500 at 1 kHz have been developed. The enhanced soft magnetic performance and manufacturability of the FeSiBNbCu nanocrystalline alloys are attributed to the high activated energy for the precipitation of α-Fe(Si) and the second phase. These alloys with excellent performance have promising applications in electromagnetic fields like inductors.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 51541106, U1510112 and 51577123), National Scientific and Technological Support Projects (No. 2013BAE0 8B01) and the Qualified Personnel Foundation of Taiyuan University of Technology (QPFT) (No: tyutrc-201370a).

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Authors and Affiliations

  1. College of Electrical and Power Engineering, Shanxi Key Laboratory of Coal Mining Equipment and Safety Control, Taiyuan University of Technology, No. 79 Yingze West Avenue, Wanbolin District, Taiyuan, 030024, Shanxi, China

    Fangpei Wan, Jianhua Zhang & Jiancheng Song

  2. Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, Zhejiang, China

    Aina He, Anding Wang, Chuntao Chang & Xinmin Wang

  3. Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China

    Aina He, Anding Wang, Chuntao Chang & Xinmin Wang

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  1. Fangpei Wan
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  2. Aina He
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  3. Jianhua Zhang
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  4. Jiancheng Song
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  5. Anding Wang
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  6. Chuntao Chang
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  7. Xinmin Wang
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Correspondence to Jianhua Zhang, Anding Wang or Chuntao Chang.

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Wan, F., He, A., Zhang, J. et al. Development of FeSiBNbCu Nanocrystalline Soft Magnetic Alloys with High B s and Good Manufacturability. J. Electron. Mater. 45, 4913–4918 (2016). https://doi.org/10.1007/s11664-016-4643-x

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