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<p>The structural, thermal, and magnetic properties of Fe<sub>84-<i>x</i></sub>Co<sub><i>x</i></sub>Ti<sub>7</sub>Zr<sub>6</sub>B<sub>3</sub> (<i>x </i>= 0, 10, 20, 30) amorphous alloy ribbons were investigated. All alloys showed a low coercivity (H<sub>C</sub>) of less than 20 A/m. As the Co content increased, the saturation magnetization (M<sub>S</sub>) tended to increase. In addition, increasing the Co content effectively suppressed the formation of the second crystallization phase, which deteriorates magnetic properties. To further improve the magnetic properties, annealing was performed at several temperatures for 10 min. Especially, after annealing at 520&#xa0;°C, all alloys exhibited lower H<sub>C</sub> than the as-spun ribbons. In addition, Fe<sub>74</sub>Co<sub>10</sub>Ti<sub>7</sub>Zr<sub>6</sub>B<sub>3</sub> showed an increase in M<sub>S</sub> of about 20 emu/g, while maintaining a H<sub>C</sub> of less than 10 A/m after the 550&#xa0;°C heat treatment. This study contributes to the development of Fe-based amorphous alloys with enhanced soft magnetic properties, which are essential for future energy technologies.</p>

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Evolution of structural and magnetic properties in Fe–Co–Ti–Zr–B amorphous alloys under controlled annealing temperatures

  • 期刊论文

  • 发表日期：

    2025年10月24日

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  • Yoojin Choi,
  • Hyunkyung Lee,
  • Haein Choi-Yim

摘要

The structural, thermal, and magnetic properties of Fe84-xCoxTi7Zr6B3 (x = 0, 10, 20, 30) amorphous alloy ribbons were investigated. All alloys showed a low coercivity (HC) of less than 20 A/m. As the Co content increased, the saturation magnetization (MS) tended to increase. In addition, increasing the Co content effectively suppressed the formation of the second crystallization phase, which deteriorates magnetic properties. To further improve the magnetic properties, annealing was performed at several temperatures for 10 min. Especially, after annealing at 520 °C, all alloys exhibited lower HC than the as-spun ribbons. In addition, Fe74Co10Ti7Zr6B3 showed an increase in MS of about 20 emu/g, while maintaining a HC of less than 10 A/m after the 550 °C heat treatment. This study contributes to the development of Fe-based amorphous alloys with enhanced soft magnetic properties, which are essential for future energy technologies.