Preparation of SiC Nanowire/Carbon Fiber Composites with Enhanced Electromagnetic Wave Absorption Performance

Herein, the SiC-coated carbon fiber decorated with SiC nanowire (SiCnw/CF) composites are successfully prepared by one-step chemical vapor infiltration (CVI) process. Microstructures, the formation mechanism of SiCnws, thermal stability performance, and electromagnetic wave (EMW) absorption performance of the composites are investigated in detail. In particularly, benefiting the dielectric loss and conductive loss, the SiCnw/CF composites obtained at 1500 degrees C exhibit superior EMW absorption property with the minimum reflection loss (RL) of -36.5 dB with the effective absorption band of 5.5 GHz at a thickness of 1.88 mm. This work provides a simple way to obtain and design the CF-based materials with good microwave absorption.