Inhibition of oxidation of carbon fibres by sol-gel coatings

TiO2 and [TiO2/β-SiC] microtubes prepared from an original process

“…Among synthetic processes which have been developed to elaborate new types of ceramic materials; the Shape Memory Synthesis (SMS), 2,3 the replicating PU foams 4 and others alternatives routes [5][6][7][8][9] have been investigated.…”

Oxidation-Resistant Coating of Carbon Fibers with TiO₂ by Sol-Gel Method

“…(4) Carbon fibers coated with TiO2 were produced at the conditions described in (1) to (3). The film coatings of the obtained carbon fibers were confirmed by SEM to be homogeneous with no cracking or peeling.…”

“…Therefore, when car bon fibers are used as metal-base or ceramic-base com posite materials, their resistance to oxidation becomes an important requirement. 3) For improvement of the oxidation resistance of carbon fibers, methods of coating the carbon fibers with oxidation resistant protective films have been developed, for exam ple, sputtering, CVD and sol-gel methods. Of these, the sol-gel method is attracting attention, because it can be us ed to produce directly a homogeneous thin film on a substrate with a large area and complex shape, by means of a fairly simple device and operational procedure, with a solu tion as a starting material.…”

Effective Surface Functionalization of Carbon Fibers for Fiber/Polymer Composites with Tailor‐Made Interfaces

“…It was reported that thermal oxidation was suppressed by the sol-gel-based SiO 2 coating on the surface of the CFs. [45] According to the thermal gravimetric and differential thermal analysis (TG-DTA), the CFs are oxidatively decomposed at approximately 600 8C, whereas the SiO 2 -coated CFs started the oxidation reaction at 800 8C. In addition, bare CFs completely decompose at 650 8C in 20 min, although it is possible to slow the decomposition down to about 130 min when SiO 2 -coated CFs are used.…”

“…[45] According to the thermal gravimetric and differential thermal analysis (TG-DTA), the CFs are oxidatively decomposed at approximately 600 8C, whereas the SiO 2 -coated CFs started the oxidation reaction at 800 8C. Among various approaches, coating by means of a wet process using metal alkoxides is important as one of the soft solution processes.…”