Influence of Al2O3 addition on the ablation behavior of SiC coatings fabricated on C/C composites

► Combination method of VPS and heat-treatment was used to deposit coatings. ► An outer layer of SiC-Al2O3 and a conversional layer of SiC-C-Al were fabricated ► The composite coating can protect the C/C substrate at 2773 K on a duration of 300 s.