Achieving broadband electromagnetic absorption at a wide temperature range up to 1273 K by metamaterial design on polymer-derived SiC-BN@CNT ceramic composites

In contemporary times, radar and infrared‐compatible stealth materials have emerged as a pivotal domain of research globally, aimed at augmenting the survivability of military assets. However, current candidates generally exhibit subpar compatibility performance in elevated temperature environments due to the imbalanced interplay between the two spectral bands. In this work, a meticulously designed sandwich‐structure SiO2/C@SiC/SiO2 composite is proposed to cope with the challenge. The middle layer of C@SiC composites possesses excellent microwave absorption performance even at high temperatures. The outer layers of SiO2 aerogels serve not only to inhibit the infrared radiation intensity, but also reinforce the microwave absorption capacity by optimizing the impedance matching and reducing the heat transferred to the middle layer. Based on the numerical simulation outcomes, the thickness of each layer has been optimized to attain a harmonious balance between microwave absorption and infrared radiation properties. Ultimately, the sandwich structured SiO2/C@SiC/SiO2 composites demonstrate low RL (reflection loss) values (←5 dB) across nearly the entire X band (8–12 GHz), alongside minimal surface temperatures hovering ≈44 °C at an ambient temperature of 200 °C. The comprehensive investigation into impact patterns and underlying mechanisms offers invaluable insights to develop radar and infrared‐compatible stealth materials for high‐temperature applications, which can be applied as stealth coatings on the skin of high Mach number aircraft.

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An Ultra‐Broadband Electromagnetic Wave Absorbing ZrB₂‐Based Ceramic Composite Inspired by Barbule of Peacock

Dai,

Jia,

Deng

et al. 2024

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Broadband electromagnetic wave (EMW) absorbing ceramic materials are highly required for the thermal parts of aerocraft. As members of ultrahigh temperature ceramics, ZrB2‐based ceramics have great potential for applications in more extreme environments relative to the currently used silicon‐based and oxide‐based ceramics. However, ZrB2 is not among the traditional EMW absorbing material candidates due to its high conductivity, which induces the strong reflection of EMW due to the impedance mismatch with free space. Herein, ZrB2‐based ceramic with a bionic microstructure inspired by peacock barbules is proposed. Boron nitride nanotubes acting as polarization centers inside the ZrB2‐based material cause massive EMW dissipation. The ceramic shows an ultra‐broadband absorption of 9.6 GHz (<−10 dB from 8.4 to 18 GHz), almost covering the entire X and Ku bands, superior to the reported ceramics. The polarization centers successfully turn the ZrB2‐based ceramic from EMW reflecting material to an excellent EMW absorbing material by the bionic barbule interspersed microstructure. The simulated metamaterial of the ceramic achieves an ultra‐broad absorption (lower than −15 dB) in the range of 2–40 GHz. This work provides valuable insights for the development of broadband absorption material for high‐temperature environments.

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Achieving broadband electromagnetic absorption at a wide temperature range up to 1273 K by metamaterial design on polymer-derived SiC-BN@CNT ceramic composites

Cited by 19 publications

References 76 publications

Integral Gel Electromagnetic Wave Absorption Materials

Integral Gel Electromagnetic Wave Absorption Materials

The Optimized Design of Sandwich Structured SiO₂/C@SiC/SiO₂ Composites Through Numerical Simulation for Temperature‐Resistant Radar and Infrared Compatible Stealth

An Ultra‐Broadband Electromagnetic Wave Absorbing ZrB₂‐Based Ceramic Composite Inspired by Barbule of Peacock

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Achieving broadband electromagnetic absorption at a wide temperature range up to 1273 K by metamaterial design on polymer-derived SiC-BN@CNT ceramic composites

Cited by 19 publications

References 76 publications

Integral Gel Electromagnetic Wave Absorption Materials

Integral Gel Electromagnetic Wave Absorption Materials

The Optimized Design of Sandwich Structured SiO2/C@SiC/SiO2 Composites Through Numerical Simulation for Temperature‐Resistant Radar and Infrared Compatible Stealth

An Ultra‐Broadband Electromagnetic Wave Absorbing ZrB2‐Based Ceramic Composite Inspired by Barbule of Peacock

Contact Info

Product

Resources

About

The Optimized Design of Sandwich Structured SiO₂/C@SiC/SiO₂ Composites Through Numerical Simulation for Temperature‐Resistant Radar and Infrared Compatible Stealth

An Ultra‐Broadband Electromagnetic Wave Absorbing ZrB₂‐Based Ceramic Composite Inspired by Barbule of Peacock