Comparative research on cyclic ablation behavior of C/C-ZrC-SiC and C/ C-ZrC composites at temperatures above 2000?C

The cyclic and single ablation behavior of C/C-ZrC-SiC and C/C-ZrC composites prepared by reactive melt infiltration were studied. The ablation resistance properties of cyclic ablation of 30 s x 4 and single ablation of 120 s was similar to that of 60 s x 4 and 240 s. The oxidation of the matrix and the peeling content of oxides are aggravated with the increased cyclic ablation numbers. Under the cyclic ablation mode, C/C-ZrC-SiC composites showed lower mass loss than C/C-ZrC composites. At the single ablation of 240 s, C/C-ZrC-SiC composites showed desirable ablation resistance owing to the formation of an effective heat/oxygen protection layer on the ablated surface.

Automated summary

The cyclic and single ablation behaviors of C/C-ZrC-SiC and C/C-ZrC composites prepared by reactive melt infiltration were studied. It was found that the C/C-ZrC-SiC composites showed better ablation resistance under cyclic ablation mode compared to C/C-ZrC composites. The formation of an effective heat/oxygen protection layer on the ablated surface contributed to the desirable ablation resistance of C/C-ZrC-SiC composites during single ablation.