Fabrication and Electromagnetic Wave Absorption Performance of C/C Composites Modified by SiC Nanowires

Abstract

Abstract: C/C composites have a wide range of applications in aerospace materials due to their low density, high temperature resistance and other characteristics. Improving the microwave absorbing performance of these materials through modification methods is expected to broaden their application fields. In this paper, C/C composite, SiC nanowire (SiC_nw), and SiC_nw modified C/C composite were fabricated by precursor infiltration and pyrolysis method, and chemical vapor reaction method using phenolic resin, Si, SiO₂ and catalyst ferrocene as raw materials. The microstructures and properties of C/C and SiC_nw/C/C composites were studied, and the influence of SiC_nw content to electromagnetic wave absorption performance of C/C composites was discussed. The results show that SiC_nw with core/shell structure is successfully introduced into C/C composite, and the SiC_nw/C/C composite exhibits excellent electromagnetic wave absorption performance with the increasing of SiC_nw content, and the minimum reflection loss of SiC_nw/C/C composite with 15.4% (mass fraction) SiC_nw is -38.02 dB with a thickness of 2.07 mm, significantly lower than those of other materials. This work provides a technical and theoretical basis for the preparation of high-performance carbon/ceramic composites.

Key words: SiC nanowire, carbon fiber, composite, electromagnetic wave absorption performance, catalyzer, chemical vapor reaction

CLC Number:

TB332

GUI Kaixuan, LUO Xiangjie, LIU Fangyu, ZHAO Xiaoyu. Fabrication and Electromagnetic Wave Absorption Performance of C/C Composites Modified by SiC Nanowires[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2024, 53(5): 889-898.

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