期刊
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
卷 6, 期 2, 页码 145-150出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1744-7402.2008.02320.x
关键词
-
资金
- Chinese Natural Science Foundation [90716023]
C/ZrB2-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, ZrB2-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 degrees 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 ZrB2-SiC mixture and pure SiC coatings. A model was put forward to account for such a result.
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