Article ID Journal Published Year Pages File Type
1468422 Corrosion Science 2016 9 Pages PDF
Abstract

•The ablation resistance of C/C–ZrC–SiC is superior in HF1 but is contrary in HF2.•ZrO2–SiO2 double-structure results in good ablation resistance of C/C–ZrC–SiC in HF1.•Collapse of ZrO2 contributes to poor ablation resistance of C/C–ZrC–SiC in HF2.

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/m2, mainly owing to the ZrO2–SiO2 with double structure formed on the surface. As ablated in the heat flux of 4.18 MW/m2, 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.

Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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