Preparation of carbon/carbon‐ultra high temperature ceramics composites with ultra high temperature ceramics coating

Abstract

Abstract In order to increase the oxidation resistance of carbon/carbon (C/C) composites at long‐term high temperature, C/C‐Ultra High Temperature Ceramics composites (UHTCs) with a dual‐layer UHTCs oxidation coating was successfully designed and fabricated. The microstructure and ablation resistance were investigated and discussed. After ablation in arc‐heated wind tunnel with temperature being 2200°C for 1000s, the mass ablation rate and linear ablation rate were −1.9 × 10 −2 mg/cm 2 s and 2.9 × 10 −5 mm/s, respectively. The formation of thermodynamically compatible oxide scale including ZrO 2 skeleton and SiO 2 or Zr–Si–O glass on the surface were mainly contributed to the excellent ablation resistance of the composite.