J. Mater. Sci. Technol. ›› 2023, Vol. 149: 214-224.DOI: 10.1016/j.jmst.2022.10.088

• Research Article • Previous Articles     Next Articles

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

Li Genga, Su Chengb, Guanghai Liub, Qiangang Fua, Hejun Lia,*   

  1. aShaanxi Carbon/Carbon Composites Engineering Technology Research Center, Northwestern Polytechnical University, Xi'an 710072, China;
    bNational Engineering Research Center of Ceramic Matrix Composite Manufacture Technology, Xi'an 710000, China
  • Received:2022-09-06 Revised:2022-10-03 Accepted:2022-10-11 Published:2023-06-20 Online:2023-01-11
  • Contact: *E-mail address: lihejun@nwpu.edu.cn (H. Li) .

Abstract: 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.

Key words: C/C composite, Laser ablation, UHTCs modification, Thermodynamic analysis, Finite element simulation