Please choose your delivery country and your customer group
In this paper, it was extensively studied what and how processing parameters for quasi-carbonization influence the tensile properties of resulting quasi-carbon fabrics that are prepared from stabilized PAN fabrics with a spun yarn texture. Seven processing parameters have been considered as follows: applied tension, final heat-treatment temperature, heating rate, heating step, holding time, cooling rate, and purging gas purity. The effect of quasi-carbonization process on the dynamic mechanical properties of quasi-carbon fabric/phenolic composites was also studied for three processing parameters of applied tension, final heat-treatment temperature and heating rate, which were examined to be most effective for improving the breaking strength and modulus of quasi-carbon fabrics. It was shown that the breaking strength and modulus of quasi-carbon fabric significantly depend on the presence and absence of applied tension during quasi-carbonization process. The higher the tension applied the greater the tensile properties. The breaking strength of quasi-carbon fabric heat-treated at 1200 deg C is increased about 37 % higher than that heat-treated at 1000 deg C. The slower the heating rate from 100 deg C/h to 30 deg C/h to the final HTT the higher the tensile properties obtained. The results inform that an appropriate selection of applied tension, final HTT, and heating rate during quasi-carbonization process is more important than other processing parameters for improving the breaking strength and modulus of quasi-carbon fabrics.