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<p>Surface coating was essential for regulating the microwave absorption of Fe-based alloys but was challenge to fabricate multistage heterostructure on the surfaces. Based on the multi-step hydrothermal reaction, multistage nanostructure was in situ constructed on flaky FeSiAl alloy. Due to dielectric regulation and the interfacial polarization, it exhibited an applicable RL value of approximately -40&#xa0;dB with EAB of 2.7&#xa0;GHz at 1.8&#xa0;mm. Excitingly, the RCS of the composites was reduced to 35.7&#xa0;dB·m<sup>2</sup> for FC2 sample, indicating promising applications. This work offers a new insight to enhance microwave absorption of FeSiAl composites by in situ designing of multistage magnetic oxide nanostructure.</p>

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Dielectric loss regulation of spinel Co-Fe oxides-coated FeSiAl composites for boosting microwave absorption

  • 期刊论文

  • 发表日期：

    2025年7月17日

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  • Xinyue Zhang,
  • Chenglong Lei,
  • Ji Ding,
  • Pingping Sun,
  • Yunjun Guo,
  • Guangsheng Qian

摘要

Surface coating was essential for regulating the microwave absorption of Fe-based alloys but was challenge to fabricate multistage heterostructure on the surfaces. Based on the multi-step hydrothermal reaction, multistage nanostructure was in situ constructed on flaky FeSiAl alloy. Due to dielectric regulation and the interfacial polarization, it exhibited an applicable RL value of approximately -40 dB with EAB of 2.7 GHz at 1.8 mm. Excitingly, the RCS of the composites was reduced to 35.7 dB·m2 for FC2 sample, indicating promising applications. This work offers a new insight to enhance microwave absorption of FeSiAl composites by in situ designing of multistage magnetic oxide nanostructure.