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A one-step fabrication of soft-magnetic high entropy alloy fiber with excellent strength and flexibility

Author

Listed:
  • Yan Ma

    (China University of Mining and Technology
    Chinese Academy of Sciences)

  • Zongde Kou

    (Nanjing University of Science and Technology)

  • Weiming Yang

    (China University of Mining and Technology)

  • Aina He

    (Chinese Academy of Sciences)

  • Yaqiang Dong

    (Chinese Academy of Sciences)

  • Qikui Man

    (Chinese Academy of Sciences)

  • Haishun Liu

    (China University of Mining and Technology)

  • Zhiming Li

    (Central South University)

  • Akihisa Inoue

    (Josai International University)

  • Jiawei Li

    (Chinese Academy of Sciences)

Abstract

Soft-magnetic fibers (SMFs) play a crucial role in energy conversion, transmission, and storage within electronic devices. However, conventional SMFs have poor plasticity and are therefore difficult to withstand long-term tensile, torsional, and shear deformation. A high fraction of grain boundaries could improve plastic deformability of conventional SMFs, but deteriorates the coercivity. This severely limits their applications in flexible electronics and multifunctional components. Herein, we propose a strategy to overcome this dilemma, which is realized by coarsening the grains of a Fe34Co29Ni29Al3Ta3Si2 high entropy alloy (HEA) fiber containing ordered coherent nanoprecipitates with small lattice misfit via a simple one-step in-rotating-water spinning method. This allows to reduce domain wall pinning and improve dislocation mobility. The resultant micron-diameter soft-magnetic HEA fiber has a tensile strength of 674 MPa at 23% elongation, a low coercivity of 8.1 Oe, a moderate magnetization of 116 emu/g at 10 kOe and a high Curie temperature of 770 K.

Suggested Citation

  • Yan Ma & Zongde Kou & Weiming Yang & Aina He & Yaqiang Dong & Qikui Man & Haishun Liu & Zhiming Li & Akihisa Inoue & Jiawei Li, 2024. "A one-step fabrication of soft-magnetic high entropy alloy fiber with excellent strength and flexibility," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-54984-7
    DOI: 10.1038/s41467-024-54984-7
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    References listed on IDEAS

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