Preparation and Properties of Ti3SiC2-modified High Silica/Phenolic Aerogel Composite

A Ti 3 SiC 2 -modified high-silica oxygen/phenolic aerogel composite with excellent oxidation resistance and high-temperature performance was prepared. The experimental results show that the obtained composite has significantly improved oxidation resistance. When the addition amount of Ti 3 SiC 2 is 75%, the carbonization volume shrinkage rate of the composite after aerobic static combustion is only 5.95%. At the same time, the LAR and MAR after 30 seconds of oxyacetylene ablation under a heat flux density of 1.5 MW/m 2 are 0.0307 mm/s and 0.0149 g/s, respectively. The compressive strength after aerobic static combustion at 1 000 °C is up to 20.43% of that before aerobic static combustion, which is 1.99 times that of the unfilled material, significantly improving the high-temperature mechanical properties of the composite.