| 引用本文: | 邹世钦,张长瑞,周新贵,等.PIP工艺制备的C/SiC复合材料的氧化行为.[J].国防科技大学学报,2005,27(5):107-112.[点击复制] |
| ZOU Shiqin,ZHANG Changrui,ZHOU Xingui,et al.The Oxidation Behaviors of C/SiC Composites Prepared by Precursor Infiltration Pyrolysis Process[J].Journal of National University of Defense Technology,2005,27(5):107-112[点击复制] |
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| PIP工艺制备的C/SiC复合材料的氧化行为 |
| 邹世钦, 张长瑞, 周新贵, 曹英斌 |
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(国防科技大学 航天与材料工程学院，湖南 长沙 410073)
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| 摘要: |
| PIP工艺制备的C/SiC复合材料中SiC基体富碳，因此增强体和基体均容易氧化。碳纤维和无涂层保护C/SiC复合材料试样在400～1300℃的氧化速率随温度升高而加快，低温为反应控制，高温为扩散控制。CVD-SiC涂层保护C/SiC复合材料和由CVD-SiC层、自愈合层、CVD-SiC层三层涂层保护C/SiC复合材料在400～1300℃的氧化先随温度升高而加快，然后减慢。三层涂层在800～1300℃有非常好的保护效果。扫描电镜照片显示自愈合层的玻璃态物质进入涂层裂纹中，填充裂纹且阻挡氧的通过，从而有良好的抗氧化保护效果。 |
| 关键词: C/SiC复合材料 先驱体浸渍裂解 氧化保护涂层 氧化行为 |
| DOI： |
| 投稿日期：2005-04-14 |
| 基金项目:国家“863”基金资助项目（2002AA305102）；国家部委基金资助项目（41312011002） |
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| The Oxidation Behaviors of C/SiC Composites Prepared by Precursor Infiltration Pyrolysis Process |
| ZOU Shiqin, ZHANG Changrui, ZHOU Xingui, CAO Yinbin |
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(College of Aerospace and Materials Engineering，National Univ.of Defense Technology，Changsha 410073，China)
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| Abstract: |
| C/SiC composites fabricated by precursor infiltration pyrolysis process are prone to oxidation above 400℃. Their oxidation behaviors have been researched on. The oxidation loss of C fiber textiles or C/SiC composites without coating increases at 400℃ to 1300℃. However,the oxidation loss of C/SiC composites with CVD-SiC coating or three-layer coating, respectively CVD-SiC layer, self-sealing layer and CVD-SiC layer, at first increases at 500℃ to 700℃, then decreases at 800～1300℃. Oxidation loss of C/SiC composites with three-layer coating are less than 6.4% at 800～1300℃ for 288h.SEM photographs indicate vitreous self-sealing layer filling in cracks. |
| Keywords: C/SiC composites precursor infiltration pyrolysis oxidation protection coating oxidation behaviors |
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