Preparation of anti-oxidative SiC/SiO2 coating on carbon fibers from vinyltriethoxysilane by sol-gel method

▸ The SiC/SiO2 coating was prepared on carbon fibers by the sol-gel method. ▸ Nano-crystallites with an average diameter of 130 nm were aligned along the fiber axis uniformly. ▸ The oxidation resistant property of coated carbon fiber was increased with the increase of sol concentration and the heat treatment temperature. ▸ The oxidation activation energy of the coated carbon fiber was increased by 23% in comparison with uncoated carbon fiber.