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<p>It is a long-standing challenge to explore the process of optimizing the properties of FeSiCr absorbing materials. Herein, FeSiCr@Fe<sub>x</sub>N composites were prepared by mixed atmosphere treatment with NH<sub>3</sub> and H<sub>2</sub>. The elements and chemical composition of the samples were determined through X-ray photoelectron spectroscopy (XPS). Transmission electron microscopy (TEM) imaging results demonstrated the generation of a nitride film, which effectively enhanced the interfacial polarization of the material and optimized the impedance matching. It is noteworthy that the composite material obtained through atmospheric treatment at 450&#xa0;°C achieves the minimum reflection loss (RL<sub>min</sub>) of −&#xa0;46.60&#xa0;dB (3&#xa0;mm) at the S-band. The radar cross-section (RCS) simulation further verifies the excellent absorbing properties of the obtained composites. This study is valuable for improving the electromagnetic absorption properties of FeSiCr powders in practical applications.</p> Graphical abstract <p>The reflection loss of FeSiCr@Fe<sub>x</sub>N composite with low thickness in S-band is −&#xa0;46.60&#xa0;dB.</p> <p></p>

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The enhanced microwave absorption in S-band of flaky FeSiCr@FexN composites

  • 期刊论文

  • 发表日期：

    2025年11月7日

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  • Benqiang Wang,
  • Zhuangzhuang Wu,
  • Yang Xu,
  • Jin Hou,
  • Tingdong Zhou,
  • Huying Yan,
  • Tianxiu Song,
  • Jialing Tang,
  • Ling Zhong,
  • Bingfei Zou

摘要

It is a long-standing challenge to explore the process of optimizing the properties of FeSiCr absorbing materials. Herein, FeSiCr@FexN composites were prepared by mixed atmosphere treatment with NH3 and H2. The elements and chemical composition of the samples were determined through X-ray photoelectron spectroscopy (XPS). Transmission electron microscopy (TEM) imaging results demonstrated the generation of a nitride film, which effectively enhanced the interfacial polarization of the material and optimized the impedance matching. It is noteworthy that the composite material obtained through atmospheric treatment at 450 °C achieves the minimum reflection loss (RLmin) of − 46.60 dB (3 mm) at the S-band. The radar cross-section (RCS) simulation further verifies the excellent absorbing properties of the obtained composites. This study is valuable for improving the electromagnetic absorption properties of FeSiCr powders in practical applications.

Graphical abstract

The reflection loss of FeSiCr@FexN composite with low thickness in S-band is − 46.60 dB.