Laser ablation mechanism of ZrC-SiC-MoSi 2 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 com-posites. The ablation behavior of these three composites was evaluated by high-energy CO2 laser irra-diation. 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 com posite showed the best ablation performance among them. It is at-tributed to the lower oxygen permeability and richer heat dissipation mechanism of the C/C-SiC-ZrC-MoSi2 composite within the total temperature threshold.(c) 2023 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

Automated summary

In this study, C/C composites were prepared using chemical vapor infiltration (CVI), and then 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, and the surface temperature distribution was simulated by finite element analysis. The results showed that the ablation resistance mechanisms of the three materials are completely different, with the C/C-SiC-ZrC-MoSi2 composite exhibiting the best ablation performance due to its lower oxygen permeability and richer heat dissipation mechanism.