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<p>Nanocrystalline soft magnetic ribbons with the composition of Fe<sub>72</sub>Ge<sub>2.5</sub>Cu<sub>1</sub>Nb<sub>2</sub>Si<sub>14.5</sub>Ga<sub>3</sub>B<sub>5</sub> are synthesized by melt spinning followed by crystallization treatment. Special attention is focused on the microstructure, crystallization process and initial permeability at elevated temperature. It is found that the Curie temperatures of amorphous phase and crystalline phase are 405 and 580&#xa0;°C, respectively. The dual-phase nanocrystalline structure with a single crystallization composition can form over a wide temperature range (<i>ΔT</i><sub><i>x</i></sub> = 227&#xa0;°C). The initial permeability of the nanocrystalline alloy annealed at 510&#xa0;°C exceeds 32000 at ambient temperature and can still remain above 27000 when measured at 450&#xa0;°C, demonstrating outstanding the high-temperature magnetic stability.</p>

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Microstructure and soft magnetic properties of nanocrystalline Fe72Ge2.5Cu1Nb2Si14.5Ga3B5 alloy

  • 期刊论文

  • 发表日期：

    2026年3月30日

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  • Rui-min Shi,
  • Kai Wang

摘要

Nanocrystalline soft magnetic ribbons with the composition of Fe72Ge2.5Cu1Nb2Si14.5Ga3B5 are synthesized by melt spinning followed by crystallization treatment. Special attention is focused on the microstructure, crystallization process and initial permeability at elevated temperature. It is found that the Curie temperatures of amorphous phase and crystalline phase are 405 and 580 °C, respectively. The dual-phase nanocrystalline structure with a single crystallization composition can form over a wide temperature range (ΔTx = 227 °C). The initial permeability of the nanocrystalline alloy annealed at 510 °C exceeds 32000 at ambient temperature and can still remain above 27000 when measured at 450 °C, demonstrating outstanding the high-temperature magnetic stability.