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Plasma-enhanced interfacial engineering of FeSiAl@PUA@SiO2 hybrid for efficient microwave absorption and anti-corrosion

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Abstract

Microwave absorption materials are prone to degradation in extremely humid and salty environments, and it is still challenging to develop a dense and firm interface to protect microwave absorbers. Herein, a robust FeSiAl@PUA@SiO2 (PUA: acrylic polyurethane) gradient hybrid was prepared through plasma-enhanced chemical vapor deposition (PECVD) to achieve efficient microwave absorption and anti-corrosion properties. The organic/inorganic dual coat of PUA/SiO2 not only facilitated the interface polarization but also effectively reduced the dielectric constant and optimized impedance matching. Owing to the unique hybrid structure, the (PECVD-FeSiAl@PUA)@SiO2 exhibited highly efficient microwave absorbing performance in frequency bands covering almost the entire Ku-bands (12–18 GHz) with a minimum reflection loss (RLmin) of −47 dB with a matching thickness of 2.3 mm. The organic/inorganic dual protection effectively shields against the corrosive medium, as the corrosion potential and the polarization resistance increased from −0.167 to −0.047 V and 8,064 to 16,273 Ω·cm2, respectively. While the corrosion current decreased from 3.04 × 10−6 to 2.16 × 10−6 A/cm2. Hence, the plasma-enhanced densification of PUA created a strong bridge to integrate FeSiAl and organic/inorganic components acquiring dual-function of efficient microwave absorption and anti-corrosion, which opened a promising platform for potential practical absorbers.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (No. 51972045), the Fundamental Research Funds for the Chinese Central Universities, China (No. ZYGX2019J025), and Sichuan Science and Technology Program (No. 2021YFG0373). The authors would like to acknowledge access to the RMIT Micro Nano Research Facility (MNRF) in the Victorian node of the Australian National Fabrication Facility (ANFF), the RMIT Microscopy and Microanalysis Facility (RMMF), as well as the financial support from Vice-Chancellor fellowship scheme at RMIT University.

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Authors and Affiliations

  1. School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, China

    Hongyan Zhang, Wei Tian, Ying Pan & Xian Jian

  2. Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou, 313001, China

    Hongyan Zhang, Ying Pan & Xian Jian

  3. Department of Engineering Technology, Huzhou College, Huzhou, 313000, China

    Feng Cao & Hui Xu

  4. School of Science, RMIT University, Melbourne, VIC, 3001, Australia

    Nasir Mahmood

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  1. Hongyan Zhang
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Zhang, H., Cao, F., Xu, H. et al. Plasma-enhanced interfacial engineering of FeSiAl@PUA@SiO2 hybrid for efficient microwave absorption and anti-corrosion. Nano Res. 16, 645–653 (2023). https://doi.org/10.1007/s12274-022-5100-1

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