Numerical simulation for isothermal chemical vaporinf iltration of C/ SiC composites component

A two-dimensional axisymmet ric model for the densification behavior of C/ SiC composites in isothermalchemical vapor infilt ration was developed according to the st ructural feature of C/ SiC composites and the physicochemical phenomena of the isothermal chemical vapor infilt ration process. A mathematical model was proposed tocharacterize the densification behavior of a small scale thruster liner component of C/ SiC composites for a rocket engine by the finite element method. The density was measured and X-ray CT was inspected in order to validate the model.The analogical regularities represented by the calculation results and the experimental data show that the model developed inthis article is reasonable and feasible to characterize the densification behavior of C/ SiC composites in ICVI process. Thecalculated results , such as distribution and evolution of porosity and density of thruster liner component , lay the foundationof further research and optimization of ICVI process for fabrication of C/ SiC composites components.