Abstract
The applications of carbon fibers are limited above 500 °C by their poor oxidation resistance in oxygen-containing atmosphere. In this study, oxidation-resistant SiO2/SiC coatings were synthesized on carbon fiber fabric by a novel plasma electrolysis spray process. The microstructure and properties of coatings prepared at different spray distances and different spray times were investigated. The coatings were mainly composed of SiO2 and SiC with a SiC content varying between about 15 and 95 wt.%. The optimal coating was obtained with a spray time of 30 s and a spray distance of 20 mm; it corresponded to an increase in the fabric burnt-out temperature by 320 °C. Additionally, the mass loss rate was only around 50% at 900 °C, while the bare carbon fiber was burnt out. The kinetics and thermodynamics processes were also investigated in order to understand this novel plasma electrolysis spray process. We believe that this process will find a wide range of applications in the surface modification of fibers.
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This study was funded by Basic Research Plan (Grant Number 201820941208) and Key Research and Development Project of Guangdong Province (Grant Number 2019B090908004).
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Bu, A., Zhang, Y., Xiang, Y. et al. Oxidation-Resistant SiO2/SiC Coatings on Carbon Fiber Fabrics Prepared by Plasma Electrolysis Spray. J Therm Spray Tech 29, 1792–1803 (2020). https://doi.org/10.1007/s11666-020-01074-x
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DOI: https://doi.org/10.1007/s11666-020-01074-x