Synergistic Effects of Hf, Zr, Ta, Nb Multi-Elements in (Hf-Zr-Ta-Nb)C Ceramic: Mechanical Property and Ablation Performance

Based on first-principles calculations and oxyacetylene ablation, (Hf-Ta)C, (Hf-Ta-Nb)C and (Hf-Zr-Ta-Nb)C ceramic were investigated. From the aspect of mechanical property, Ta, Nb and Zr elements in the HfC lattice will cause differential lattice distortion δ (Nb