C/C composites were prepared by chemical vapor infiltration(CVI),and then were subjected to Si,Zr,and MoSi_(2) reactive melt infiltration(RMI)to obtain C/C-SiC,C/C-SiC-ZrC,and C/C-SiC-ZrC-MoSi_(2) com-posites.The abla...C/C composites were prepared by chemical vapor infiltration(CVI),and then were subjected to Si,Zr,and MoSi_(2) reactive melt infiltration(RMI)to obtain C/C-SiC,C/C-SiC-ZrC,and C/C-SiC-ZrC-MoSi_(2) com-posites.The ablation behavior of these three composites was evaluated by high-energy CO 2 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-MoSi_(2) 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-MoSi_(2) composite within the total temperature threshold.展开更多
文摘C/C composites were prepared by chemical vapor infiltration(CVI),and then were subjected to Si,Zr,and MoSi_(2) reactive melt infiltration(RMI)to obtain C/C-SiC,C/C-SiC-ZrC,and C/C-SiC-ZrC-MoSi_(2) com-posites.The ablation behavior of these three composites was evaluated by high-energy CO 2 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-MoSi_(2) 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-MoSi_(2) composite within the total temperature threshold.
