Abstract
We propose a method to improve the ablation and oxidation resistance by designing specified microstructures on the surface of silicon carbide (SiC) based ceramic. Three different types of micropatterns were designed and simulations were carried out to compare their effects. Experiments on SiC ceramic at temperature of 1700°C–1750°C were conducted to validate the design. Results showed a favorable correlation between the pattern design, simulation, and experiments. These specifically designed microstructures can modify the local flow fields, change the local oxygen concentration and chemical reaction rate due to the structural influence on the fluids dynamics of high‐temperature gas flow. They can also tune the adhesion property between the liquid silica and SiC substrate by “locking in” the liquid silica on the surface to prevent further oxygen diffusion.
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