Gradient-structured SiCf/SiC hybrid woven metamaterials with superior broadband absorption and high-load bearing

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2024-09-23 DOI:10.1016/j.ceramint.2024.09.284

Majuan Zhao, Jianhua Zheng, Xiaoxu Wang, Jiajing Zhang, Diantang Zhang

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引用次数: 0

Abstract

SiC_f/SiC composites provide a possibility to achieve the structure-function integration of military stealth materials used for aircraft tail. However, how to overcome narrow-band electromagnetic wave (EMW) absorption remains challenging. Herein, based on the adjustable permittivity of SiC fibers and the flexible design of woven structures, a gradient-structured SiC_f/SiC hybrid woven metamaterial (GHWMM) is engineered with three different permittivity SiC fibers. The absorbing properties and mechanisms of the GHWMM were studied by combining experiment and simulation. Benefiting from the synergistic effect of strong dielectric loss, structural loss, and impedance matching, the GHWMM harvests an average reflection loss (RL) of −12 dB (93.7 % absorptivity), with an effective absorption bandwidth (EAB, RL ≤ −10 dB) of up to 10.7 GHz in the 4–18 GHz. Surprisingly, at high temperature of 1000 °C, the GHWMM still exhibits a RL below −5 dB in most frequency bands. Moreover, the GHWMM displays excellent wide-angle incidence characteristics, while possessing a remarkable flexural strength of 226.4 MPa. This work lays a foundation for the renewal of textile structures and the preparation of large-size assemblies, which holds promising prospect for application in the field of aircraft hot end components.

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梯度结构 SiCf/SiC 混合编织超材料具有优异的宽带吸收和高承载能力

碳化硅/碳化硅复合材料为实现飞机尾翼军用隐形材料的结构功能一体化提供了可能。然而，如何克服窄带电磁波（EMW）吸收仍然是一个挑战。本文基于碳化硅纤维的可调介电常数和编织结构的灵活设计，用三种不同介电常数的碳化硅纤维设计了一种梯度结构的碳化硅/碳化硅混合编织超材料（GHWMM）。通过实验和模拟相结合的方法研究了 GHWMM 的吸收特性和机制。得益于强介质损耗、结构损耗和阻抗匹配的协同效应，GHWMM 的平均反射损耗（RL）为 -12 dB（吸收率为 93.7%），在 4-18 GHz 范围内的有效吸收带宽（EAB，RL ≤ -10 dB）高达 10.7 GHz。令人惊讶的是，在 1000 °C 的高温下，GHWMM 在大多数频段的 RL 仍低于 -5 dB。此外，GHWMM 还显示出卓越的广角入射特性，同时具有 226.4 兆帕的出色抗弯强度。这项工作为纺织结构的更新和大尺寸组件的制备奠定了基础，在飞机热端组件领域的应用前景十分广阔。

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

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.