Rapid microwave synthesis of coaxial SiC/carbon fibre (SiC/CF) with improved oxidation resistance and wettability. Issue 2 (1st February 2019) - Xiao, Ting
Abstract: Coaxial SiC/carbon fibre (SiC/CF) materials were prepared via rapid microwave synthesis at 1400 °C for 30 min. X-ray diffraction, scanning electron microscopy, and thermogravimetric analysis were performed to investigate the structure and oxidation resistance of the samples. The results showed that a uniform and continuous β-SiC shell was obtained after the oxidation, confirming that the SiC/CF samples had a coaxial structure. The shell thickness could be regulated by adjusting the Si:C molar ratio. The SiC shell improved the oxidation resistance of the CFs significantly. The surface wettability of SiC/CF was also investigated. It was found that the hydrophilic and rough SiC shell played an important role in enhancing the wettability of the CFs.