Ablation Resistance of Different Coating Structures for C/ZrB2–SiC Composites Under Oxyacetylene Torch Flame
Ablation Resistance of Different Coating Structures for C/ZrB2–SiC Composites Under Oxyacetylene Torch Flame
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DOI：
10.1111/j.1744-7402.2008.02320.x
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发表时间：
2009-03
影响因子：
2.1
通讯作者：
Houbu Li;Litong Zhang;Lai-fei Cheng;Yiguang Wang
中科院分区：
文献类型：
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作者：
Houbu Li;Litong Zhang;Lai-fei Cheng;Yiguang Wang
采用聚合物浸渍热解结合浆料浸渍法制备了C/ZrB 2 -SiC复合材料。为了提高复合材料的抗烧蚀性能，采用了3种涂层结构：纯SiC涂层、ZrB 2 -SiC混合涂层和ZrC-SiC交替多层涂层。烧蚀实验在温度约为3000°C的氧乙炔炬火焰上进行。ZrC-SiC交替多层膜的耐烧蚀性能最好。ZrC-SiC交替多层涂层的线冲蚀率是ZrB 2 -SiC混合涂层和纯SiC涂层的一半。提出了一个模型来解释这一结果。
C/ZrB 2 -SiC composites were fabricated by polymer infiltration and pyrolysis combined with slurry impregnation method. Three kinds of coating structures for these composites were applied in order to improve their ablation resistance: pure silicon carbide coatings, ZrB 2 -SiC mixture coatings, and ZrC-SiC alternating multilayer coatings. The ablation experiments were carried out on an oxyacetylene torch flame with a temperature of about 3000°C. The ZrC-SiC alternating multilayer showed the best ablation resistance. The linear erosion rate for ZrC-SiC alternating multilayer coatings is half of that for ZrB 2 -SiC mixture and pure SiC coatings. A model was put forward to account for such a result.