Ablation in different heat fluxes of C/C composites modified by ZrB2–ZrC and ZrB2–ZrC–SiC particles
Ablation in different heat fluxes of C/C composites modified by ZrB2–ZrC and ZrB2–ZrC–SiC particles
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DOI：
10.1016/j.corsci.2013.04.038
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发表时间：
2013-09
影响因子：
8.3
通讯作者：
Lei Liu;Hejun Li;W. Feng;Xiaohong Shi;Kezhi Li;Ling-jun Guo
中科院分区：
文献类型：
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作者：
Lei Liu;Hejun Li;W. Feng;Xiaohong Shi;Kezhi Li;Ling-jun Guo
采用氧乙炔焰烧蚀技术，研究了ZrB 2-ZrC-SiC颗粒（C/C-Z-SiC）、C/C-Z和C/C复合材料在不同热流密度下的烧蚀行为。结果表明，C/C-Z-SiC复合材料在热流密度为2.38MW/m2时烧蚀性能最好，当热流密度从2.38增加到4.18MW/m2时，其烧蚀率增加最快。C/C复合材料在较低热流密度下的烧蚀性能最差，烧蚀率增长最慢。Z、SiC和C的热失配以及SiO2的蒸发导致了不同的烧蚀行为。
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/m2whereas 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 SiO2induced the various ablation behavior.