Numerical Simulation of Isothermal Chemical Vapor Infiltration Process for Fabrication of C/SiC Composites

The multi-scale porosity model depicting infiltration induced changes of carbon fiber preform and the mathematical model depicting ICVI process for fabrication of C/SiC composites were developed. The integrated model was proposed to simulate densification behavior of C/SiC composites. The correspondences of calculation results and the experimental data indicate that the model is reasonable and feasible to characterize ICVI process of C/SiC composites. The calculated results, such as distribution of local porosity, uniformity of densification and evolution of global porosity during infiltration process, lay foundation of further research and optimization of ICVI process for fabrication of C/SiC composites.