FABRICATION OF TiO_2 COATED C_f/ Al BY USING SOL-GEL TECHNIQUE
溶胶—凝胶法TiO2涂层碳纤维增强铝基复合材料

TiO2 sol was prepared by hydrolysis and polycondensation of titania alkoxides in the presence of acetic acid. Further study focused on dipping TiO2 oxide coating on carbon fibers by sol-gel continous processing and fabrication of Cf/ Al preformed wire.Some characterization methods such as IR, TG-DTA, XRD, SEM are used. The results show that the effect of TiO2 coating depends on the viscosity of sol. After coating treatment,the cracks on carbon fiber surface are covered, oxidation resistance of carbon fibers is enhanced, the wettability between the fibers and melting aluminum is greatly improved and the tensile strength of C / Al prefabrication is heigtened.