| 引用本文: | 吴恒,张东生,姚栋嘉,刘喜宗,董会娜,杨超.SiC-MoSi2涂层C/C复合材料的动态氧化行为研究[J].材料科学与工艺,2019,27(6):84-89.DOI:10.11951/j.issn.1005-0299.20180258. |
| WU Heng,ZHANG Dongsheng,YAO Dongjia,LIU Xizong,DONG Huina,YANG Chao.Study on dynamic oxidation behavior of silicon carbide/molybdenum disilicide coated carbon/carbon composites[J].Materials Science and Technology,2019,27(6):84-89.DOI:10.11951/j.issn.1005-0299.20180258. |
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| 摘要: |
| C/C复合材料在使用过程中往往经受急冷急热与高温燃气冲刷。为了研究涂层C/C复合材料的动态氧化行为及失效机制,本文对SiC/MoSi2涂层C/C复合材料试样的全温抗氧化性能以及抗冲刷性能进行测试分析.结果表明:SiC/MoSi2涂层试样具有良好的高温抗燃气氧化冲刷性能,在经历1 600 ℃高温燃气冲刷55.5 h,10次室温~1 600 ℃~室温急冷急热考核后,失重率仅为7.68%；涂层试样在高温风洞中动态氧化失效的原因是位于缺陷氧化最敏感温度处的试样微区的氧化损耗最为严重,导致试样在该微区处的力学性能显著下降,使其无法承受气动载荷而发生断裂. |
| 关键词: C/C复合材料 SiC/MoSi2涂层 高温抗冲刷性能 动态氧化行为 失效机制 |
| DOI：10.11951/j.issn.1005-0299.20180258 |
| 分类号:TB332 |
| 文献标识码:A |
| 基金项目: |
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| Study on dynamic oxidation behavior of silicon carbide/molybdenum disilicide coated carbon/carbon composites |
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WU Heng, ZHANG Dongsheng, YAO Dongjia, LIU Xizong, DONG Huina, YANG Chao
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(Gongyi Van-Re Yihui Composite Material CO., LTD, Gongyi 451261, China)
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| Abstract: |
| Carbon/Carbon(C/C) composites are often subjected to rapid cooling and high-temperature gas erosion. In order to study the dynamic oxidation behavior and failure mechanism of coated C/C composites, the full temperature oxidation resistance and anti-erosion performance of silicon carbide/molybdenum disilicide (SiC/MoSi2) coated C/C composites were analyzed. Results showed that the SiC/MoSi2 coated samples had good anti-erosion ability. The weight loss of the coated sample was only 7.68% after subjected to 1 600 ℃ gas flushing for 55.5 h and 10 times of room temperature~1 600 ℃~room temperature quenching and rapid thermal tests. The failure mechanism of the coated samples’ antioxidation performance was analyzed and summerized, namely, the oxidation loss of the coated samples at the most sensitive temperature region was the most serious, which led to the decrease in mechanical properties of the coated samples at the region, making it unable to withstand gas erosion load and then broken. |
| Key words: C/C composites SiC/MoSi2 coating high temperature erosion resistance dynamic oxidation behavior failure mechanism |
