Laser ablation mechanism of ZrC-SiC-MoSi₂ ternary ceramic modified C/C

C/C composites were prepared by chemical vapor infiltration (CVI), and then were subjected to Si, Zr, and MoSi₂ reactive melt infiltration (RMI) to obtain C/C-SiC, C/C-SiC-ZrC, and C/C-SiC-ZrC-MoSi₂ composites. The ablation behavior of these three composites was evaluated by high-energy CO₂ laser irradiation. The surface temperature distribution of composite materials was simulated by finite element analysis. The results show that the ablation resistance mechanisms of the three materials are entirely different. The C/C-SiC-ZrC-MoSi₂ composite showed the best ablation performance among them. It is attributed to the lower oxygen permeability and richer heat dissipation mechanism of the C/C-SiC-ZrC-MoSi₂ composite within the total temperature threshold.