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

【摘要】 A Ti₃SiC₂-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 Ti₃SiC₂ 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/m² are 0.0307 mm/s and 0.0149 g/s,respectively.The compressive strength after aerobic static combustion at 1 000 ℃ 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.更多还原

【Abstract】 A Ti₃SiC₂-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 Ti₃SiC₂ 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/m² are 0.0307 mm/s and 0.0149 g/s,respectively.The compressive strength after aerobic static combustion at 1 000 ℃ 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.更多还原