Ablation in different heat fluxes of C/C composites modified by ZrB2–ZrC and ZrB2–ZrC–SiC particles

•Two heat fluxes were used to evaluate the ablation of modified C/C composites.•C/C–ZrB2–ZrC–SiC has the lowest ablation rate under a heat flux of 2.38MW/m2.•Ablation rates of C/C shows the smallest increase with increase in heat flux.•Thermal mismatch and evaporation of SiO2 dominate variations in...

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Veröffentlicht in:Corrosion science Jg. 74; S. 159 - 167
Hauptverfasser: Liu, Lei, Li, Hejun, Feng, Wei, Shi, Xiaohong, Li, Kezhi, Guo, Lingjun
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Kidlington Elsevier Ltd 01.09.2013
Elsevier
Schlagworte:
A. Ceramic matrix composites
Applied sciences
B. SEM
Building materials. Ceramics. Glasses
C. High temperature corrosion
C. Oxidation
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Technical ceramics
B. SEM
C. High temperature corrosion
C. Oxidation
A. Ceramic matrix composites
Scanning electron microscopy
Temperature
High temperature
Ablation
Carbon
Composite material
Silicon carbide
Zirconium boride
Oxidation
Ceramic materials
High temperature corrosion
Heat transfer
ISSN:0010-938X, 1879-0496
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Zusammenfassung:•Two heat fluxes were used to evaluate the ablation of modified C/C composites.•C/C–ZrB2–ZrC–SiC has the lowest ablation rate under a heat flux of 2.38MW/m2.•Ablation rates of C/C shows the smallest increase with increase in heat flux.•Thermal mismatch and evaporation of SiO2 dominate variations in the ablation behavior. Carbon/carbon composites modified by ZrB2–ZrC–SiC particles (C/C–Z–SiC), C/C–Z and C/C were ablated by oxyacetylene torch using two different heat fluxes to investigate the effect of doped ceramic particles. Results indicated that C/C–Z–SiC had the best ablation property in heat flux of 2.38MW/m2 whereas their ablation rates increased fastest when heat flux rising from 2.38 to 4.18MW/m2. C/C composites had the poorest ablation property in the lower heat flux and their ablation rates increased slowest. Thermal mismatch of Z, SiC and C and evaporation of SiO2 induced the various ablation behavior.
ISSN:0010-938X
1879-0496
DOI:10.1016/j.corsci.2013.04.038