Microstructural evolution mechanism of plain-woven SiC/SiC during thermal ablation

The ablation characteristics of plain-woven SiC/SiC composites were investigated using an oxy-acetylene flame to reveal the failure process. The results showed that the linear ablation rate decreased linearly with time to 0.035 mm/s at 60 s of ablation. The ablation process of single SiC fibers resulted in the formation of a char-acteristic SiO2 broken porous tubular structure on the external surface. Due to the characteristics of the warp and weft weave structure of the material, resulting in the formation of micro-pits on the surface of the SiC fibers.

Automated summary

The ablation characteristics of plain-woven SiC/SiC composites were studied using an oxy-acetylene flame, showing a linear decrease in ablation rate over time and the formation of porous tubular structures and micro-pits on the surface of SiC fibers.