Ablation microstructurecharacterization and analysis of multidimensional carbon/carbon composites throat

The ablation morphologies of the C/C composites thoat different parts were investigated by Surface Roughness, scanning electron microscopy (SEM) and energy diffraction spectrum (EDS) on microstructure scale. The results show that ablation begin firstly from interface and defect. Carbon has difference ablation speed with substance carbon. Ablation performance of carbon fiber precede in substance carbon. Ablation of C/C composites throat controlled by thermochemistry ablation and machine ablation together. The ablation morphologies between entrance part, throat and exit part are different which may closely relate with temperature, velocity and concentration of the fuel.