Porous and lightweight continuous SiC fiber reinforced Si3N4–SiC composites for wide frequency electromagnetic wave absorption

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering Pub Date : 2025-04-06 DOI:10.1016/j.compositesb.2025.112497

Zhenzhong Xing , Xiao You , Huiying Ouyang , Qiuqi Zhang , Yuanhang Yang , Meihan Ren , Mengmeng Wang , Xiangyu Zhang , Jinshan Yang , Shaoming Dong

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引用次数: 0

Abstract

To cope with the increasing trend of heat flow and electromagnetic radiation generated by high-power electronic devices, it is urgent to develop electromagnetic wave absorbing (EMA) materials with both high-temperature resistance and a certain stiffness. In this work, a ceramic matrix composite is constructed with SiC fibers as the reinforcement and electromagnetic loss phase, which presents a considerable effective absorption bandwidth (EAB) of 8.78 GHz (9.20–17.98 GHz) at a thickness of 2.8 mm. The excellent electromagnetic wave (EMW) absorption performance can be attributed to the design of a porous and multiphase ceramic matrix, including the high EMW-lossy amorphous SiC phase and high EMW-transmittance Si₃N₄ phase. The constructed multi-phase structure can realize an ideal impedance matching, while also ensuring high loss capacity. Moreover, the SiC_f/Si₃N₄–SiC composites retain a discrete pore structure in the matrix, which not only optimizes the dielectric characteristics, but endows the lightweight structure of 1.95 g cm⁻³. Despite this, the composites present a bending strength of 92.38 MPa. The porous SiC_f/Si₃N₄–SiC composites designed in this work take into account the lightweight structure, high strength, and wide absorption bandwidth, which provide a new design routine for the functional design of ceramic matrix composites.

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来源期刊

Composites Part B: Engineering 工程技术-材料科学：复合

CiteScore

24.40

自引率

11.50%

发文量

784

审稿时长

21 days

期刊介绍： Composites Part B: Engineering is a journal that publishes impactful research of high quality on composite materials. This research is supported by fundamental mechanics and materials science and engineering approaches. The targeted research can cover a wide range of length scales, ranging from nano to micro and meso, and even to the full product and structure level. The journal specifically focuses on engineering applications that involve high performance composites. These applications can range from low volume and high cost to high volume and low cost composite development. The main goal of the journal is to provide a platform for the prompt publication of original and high quality research. The emphasis is on design, development, modeling, validation, and manufacturing of engineering details and concepts. The journal welcomes both basic research papers and proposals for review articles. Authors are encouraged to address challenges across various application areas. These areas include, but are not limited to, aerospace, automotive, and other surface transportation. The journal also covers energy-related applications, with a focus on renewable energy. Other application areas include infrastructure, off-shore and maritime projects, health care technology, and recreational products.