When the heat flow on the surface of CFC is evenly distributed, the substrate density is lower than that of the fiber, resulting in a slightly faster ablation rate of the substrate.

As the ablation progresses, the fibers of the CFC are exposed. Under the action of ultra-high heat flow in a short time, the surface temperature field of CFC presents exponential distribution.

When the temperature is higher than a certain value, the strength of CFC will be reduced, in addition, the fiber of CFC will be converted into amorphous carbon. Combined with the shear force of the airflow and the vortex separation resistance, the fibers of the CFC will be stripped in a granular manner.

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