Hierarchical 3D FeCoNi Alloy/CNT @ Carbon Nanofiber Sponges as High-Performance Microwave Absorbers with Infrared Camouflage
Year: 2024
Type: article
Abstract: Microwave absorbers with infrared camouflage are highly desirable in military fields. Self-supporting 3D architectures with tailorable shapes, composed of FeCoNi alloy/carbon nanotubes (CNT) @carbon nanofibers (CNF), were fabricated in this study. On the one hand, multiple loss mechanisms were introduced into the high elastic sponges. Controllable space conductive networks caused by the in-situ growth of CNT on the CNF, contribute to the effective dielectric and resistance loss. And the uniformly distributed magnetic alloy nanoparticles (NPs) with dense magnetic coupling result in magnetic loss. On the other hand, heterogeneous interfaces were constructed by multicomponent engineering, causing interfacial polarization and polarization loss. Furthermore, the internal structures of sponges were optimized by regulating the alloy NPs sizes and the growth state of CNT, then tuning the impedance matching and microwave absorption. Therefore, FeCoNi alloy/CNT @CNF (FCCF) sponges with ultra-low density (7.6 mg·cm-3) were found to have excellent radar and infrared compatible stealth properties, displaying a minimum refection loss (RLmin) of -50.5 dB and a maximum effective absorption bandwidth (EABmax) of 5.36 GHz. Moreover, the radar stealth effect of the sponges were evaluated by radar cross section (RCS) simulation, revealing that the multifunctional sponges have a promising prospect in military applications.
Source: Materials
DOI: 10.3390/ma18010113
Authors: Yifan Fei, Junya Yao, Wei Cheng, Wenling Jiao
Institution: Donghua University
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,955
OpenAlex ID: W4405948751