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<p>The integration of electromagnetic wave absorption and structural durability in extreme environments remains a critical challenge for advanced aerospace fields. The SiOC layer and SiC filler were incorporated into the SiC<sub>f</sub>/mullite composites via the precursor infiltration and pyrolysis (PIP) process. This combination effectively tailored the interfacial bonding strength and complex permittivity of the composite. These components also induced multiple scattering, dipolar polarization, and interfacial polarization, which are crucial for electromagnetic wave absorption. The SiC<sub>f</sub>/mullite composite with a SiOC layer and 15-wt% SiC filler achieved a flexure strength of 188&#xa0;MPa. In terms of electromagnetic wave absorption performance, it exhibited a minimum reflection loss (<i>RL</i><sub>m</sub>) of –18.86&#xa0;dB and the corresponding effective absorption bandwidth (EAB) reached 1.43&#xa0;GHz. The SiC<sub>f</sub>/mullite composite with a SiOC layer and 20-wt% SiC filler achieved a flexure strength of 175.51&#xa0;MPa. Additionally, its <i>RL</i><sub>m</sub> reached –55.33&#xa0;dB and the EAB reached 2.08&#xa0;GHz. Furthermore, the SiC<sub>f</sub>/mullite composite without a SiOC layer and filler demonstrated a flexure strength of 155.24&#xa0;MPa and an <i>RL</i><sub><i>m</i></sub> of –8.57&#xa0;dB.</p>

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Simultaneously enhancing mechanical and electromagnetic wave absorption properties of the SiCf/mullite composites with SiOC layer and SiC filler

  • 期刊论文

  • 发表日期：

    2026年6月23日

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  • Zhaowen Ren,
  • Dawei Shao,
  • Jiangang Zhang,
  • Jingjing Dai,
  • Zhun Qiao,
  • Jiaxin Yang,
  • Shichang Duan,
  • Haijun Pan,
  • Shaowen Li,
  • Xiaoxian Wang,
  • Di Ran,
  • Yingze Zheng

摘要

The integration of electromagnetic wave absorption and structural durability in extreme environments remains a critical challenge for advanced aerospace fields. The SiOC layer and SiC filler were incorporated into the SiCf/mullite composites via the precursor infiltration and pyrolysis (PIP) process. This combination effectively tailored the interfacial bonding strength and complex permittivity of the composite. These components also induced multiple scattering, dipolar polarization, and interfacial polarization, which are crucial for electromagnetic wave absorption. The SiCf/mullite composite with a SiOC layer and 15-wt% SiC filler achieved a flexure strength of 188 MPa. In terms of electromagnetic wave absorption performance, it exhibited a minimum reflection loss (RLm) of –18.86 dB and the corresponding effective absorption bandwidth (EAB) reached 1.43 GHz. The SiCf/mullite composite with a SiOC layer and 20-wt% SiC filler achieved a flexure strength of 175.51 MPa. Additionally, its RLm reached –55.33 dB and the EAB reached 2.08 GHz. Furthermore, the SiCf/mullite composite without a SiOC layer and filler demonstrated a flexure strength of 155.24 MPa and an RLm of –8.57 dB.