Ablation properties of 2D C/SiC-ZrB ₂ composite

2D C/SiC-ZrB ₂ composite was fabricated by combining chemical vapor infiltration, ZrB ₂ slurry infiltration and polymer infiltration and pyrolysis method. The ablation properties of the composite under oxyacetylene flame and 1800°C methane combustion wind tunnel were studied. The results show that under the oxyacetylene flame environment, the linear ablation rate and the mass ablation rate of the 2D C/SiC-ZrB ₂ are 6.1×10 ^-2mm/s and 1.0×10 ^-2g/s respectively. The anti-ablation performance is improved by infiltrated ZrB ₂ particles into C/SiC matrix. Under the 1800°Cmethane combustion wind tunnel, the coating density plays a major role on the ablation behavior. At the same coating density, the mass ablation rate increases with the open porosity of the composites. The addition of ZrB ₂ to C/SiC has little effect on the anti-ablation performance.