Interfacial modification and cyclic ablation behaviors of a SiC/ZrB2-SiC/SiC triple-layer coating for C/SiC composites at above 2000°C
Interfacial modification and cyclic ablation behaviors of a SiC/ZrB2-SiC/SiC triple-layer coating for C/SiC composites at above 2000°C
复制标题
C/SiC复合材料SiC/ZrB2-SiC/SiC三层涂层在2000℃以上的界面改性及循环烧蚀行为
DOI：
10.1016/j.corsci.2020.108604
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发表时间：
2020
影响因子：
8.3
通讯作者：
Sufang Tang
中科院分区：
文献类型：
--
作者：
Pengju Tang;Chenglong Hu;Shengyang Pang;Jian Li;Lei Wang;Sufang Tang
采用化学气相沉积（CVD）、浆液刷烧和CVD法制备了SiC/ZrB2-SiC/SiC三层复合涂层。为了提高耐循环烧蚀性能，对内部SiC层进行了预氧化处理。1600 ℃预氧化涂层的结合强度达到32 MPa，比未氧化涂层的结合强度提高77.8%。该涂层可承受2050 °C至室温的5次烧蚀循环而不脱落，6次循环后显示出18 mm2的小剥落面积。详细讨论了循环烧蚀机理。
A SiC/ZrB2-SiC/SiC triple-layer coating was fabricated successively by chemical vapor deposition (CVD), slurry brushing-sintering and CVD for C/SiC composites. To enhance the cyclic ablation resistance, a pre-oxidation treatment on the inner SiC layer was performed. The bonding strength of the coating with pre-oxidation at 1600 °C is significantly improved to 32 MPa, 77.8 % greater than that of the untreated specimen. The coating can endure 5 ablation cycles from 2050 °C to room temperature without peeling off and displays a small spalling area of 18 mm2after 6 cycles. The cyclic ablation mechanisms are discussed in detail.