ZrC has drawn wide attention as an anti-ablation coating material for lightweight C/C composites but is limited by the produced porous and loose ZrO2 film. To address this issue, the second phase is introduced to improve the densification of the formed Zr-X-O film. Such as ZrC-SiC/TaC coating, the produced low-melting-point oxides, SiO2 (Tm=1650 °C), Ta2O5 (Tm=1800 °C) and Zr6Ta2O17 (Tm=1900 °C), helped to form a dense oxides film.
