Ablation behaviour of C/C and C/C-ZrC-SiC composites with cone-shaped holes under an oxyacetylene flame

摘要

The ablation behaviour of C/C and C/C-ZrC-SiC composites with cone-shaped holes was studied under an oxyacetylene flame in two heat fluxes. The results showed that C/C-ZrC-SiC composites had a superior ablation resistance in the heat flux of 2.38 MW/m(2), mainly owing to the ZrO2-SiO2 with double structure formed on the surface. As ablated in the heat flux of 4.18 MW/m(2), the ablation resistance of C/C-ZrC-SiC composites was worse than that of C/C composites since the high temperature corrosion resulted in a heavy evaporation of SiO2 and the left ZrO2 skeleton was easily scoured away by the strong scouring force of flame. (C) 2015 Elsevier Ltd. All rights reserved.