| abstract |
The invention relates to a method for realizing a large-gradient transition layer of an ultrahigh-temperature light thermal protection material, belonging to the field of inorganic ultrahigh-temperature protection materials. The method takes an oxidation protection carbon fiber reinforced framework as an ultrahigh-temperature light thermal protection material, adopts a liquid-phase induced coating, dipping and curing method to introduce ultrahigh-temperature ceramic powder with different expansion coefficients into different depth ranges of a material surface layer, realizes control of pore filling degrees in different depth ranges through introduction of different times, realizes gradient change of a material surface layer thermal expansion coefficient and the pore filling degrees, carries out ceramic formation through high-temperature sintering, forms a large-gradient transition layer, realizes integration of the transition layer and the ultrahigh-temperature light thermal protection material, and has a good enhancement effect on the mechanical properties of the ultrahigh-temperature light thermal protection material surface layer. |