SiCnws/CNTs/Cf-C/SiOC composites with multi-scale lossy phases for simultaneous electromagnetic wave absorption and thermal insulation

IF 8.4 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Journal of Materiomics Pub Date : 2024-05-30 DOI:10.1016/j.jmat.2024.04.010

Bin Ren , Yujun Jia , Hao Chen , Jiaying Ti , Yumeng Deng , Qiang Zhuang , Hejun Li

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Abstract

Carbon fiber reinforced carbon-based composites are considered to be an ideal lightweight material with exceptional high-temperature mechanical performance. Nevertheless, their high conductivity result in a strong reflection rather than absorption of electromagnetic wave (EMW) for the stealth application. To address this challenge, a novel carbon-based composite made of multi-scale lossy phases (Carbon nanotubes (CNTs), SiC nanowires (SiC_nws), and Carbon fiber (C_f)) and impedance matching phase (SiOC ceramic) was fabricated by the precursor-derived method. The prepared SiC_nws/CNTs/C_f-C/SiOC (SCC-CS) composites exhibit an effective absorption (EAB) of 2.4 GHz at a thickness of 1.9 mm and a minimum reflection loss (RL_min) of −58.44 dB (99% absorption) in the X band. The EMW absorption of the composite is attributed to the multiple loss mechanisms and favorable impedance matching with free space, caused by the multi-conductive phase and SiOC in the composite. In addition, the fabricated composites also have thermal insulation properties and can effectively achieve radar cross-sectional (RCS) reduction, which are promising aerospace composites with the integration of structure and function.

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具有多尺度有损相的 SiCnws/CNTs/Cf-C/SiOC 复合材料，可同时吸收电磁波并隔热

碳纤维增强碳基复合材料被认为是一种理想的轻质材料，具有优异的高温机械性能。然而，在隐身应用中，碳纤维的高导电性会导致对电磁波（EMW）的强烈反射而非吸收。为了应对这一挑战，我们采用前驱体衍生法制造了一种由多尺度损耗相（碳纳米管（CNTs）、碳化硅纳米线（SiCnws）和碳纤维（Cf））和阻抗匹配相（SiOC 陶瓷）组成的新型碳基复合材料。制备的 SiCnws/CNTs/Cf-C/SiOC (SCC-CS) 复合材料在厚度为 1.9 mm 时的有效吸收 (EAB) 为 2.4 GHz，在 X 波段的最小反射损耗 (RLmin) 为 -58.44 dB（99% 吸收）。复合材料的电磁波吸收归因于复合材料中的多导电相和 SiOC 所产生的多重损耗机制以及与自由空间的良好阻抗匹配。此外，制备的复合材料还具有隔热性能，并能有效降低雷达截面（RCS），是一种结构与功能一体化的航空航天复合材料，具有广阔的应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Materiomics Materials Science-Metals and Alloys

CiteScore

14.30

自引率

6.40%

发文量

331

审稿时长

37 days

期刊介绍： The Journal of Materiomics is a peer-reviewed open-access journal that aims to serve as a forum for the continuous dissemination of research within the field of materials science. It particularly emphasizes systematic studies on the relationships between composition, processing, structure, property, and performance of advanced materials. The journal is supported by the Chinese Ceramic Society and is indexed in SCIE and Scopus. It is commonly referred to as J Materiomics.