| 碳/碳复合材料表面SiC/c-AlPO_4复合涂层及其抗氧化机制 |
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| 引用本文： | 杨文冬,黄剑锋,曹丽云,夏昌奎.碳/碳复合材料表面SiC/c-AlPO_4复合涂层及其抗氧化机制[J].硅酸盐学报,2010,38(2). |
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| 作者姓名： | 杨文冬 黄剑锋 曹丽云 夏昌奎 |
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| 作者单位： | 教育部轻化工助剂化学与技术重点实验室,陕西科技大学,西安,710021 |
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| 基金项目： | 国家自然科学基金(50772063);;教育部博士点基金(20070708001);;陕西省自然科学基金(SJ08-ZT05);;教育部新世纪优秀人才支持计划基金(NECT-06-0893);;陕西科技大学研究生创新基金资助项目 |
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| 摘 要： | 采用二次包埋法和水热电泳沉积法相结合的工艺在碳纤维增强碳复合材料表面制得SiC/方石英型磷酸铝(cristobalite aluminum phosphate,c-AlPO4)复合涂层。借助X射线衍射仪和扫描电镜对复合涂层的晶相组成和显微结构进行了表征。研究了复合涂层的高温氧化性能,讨论了复合涂层氧化、失效的机理。结果表明:复合涂层具有双层结构,包埋的SiC内层主要由α-SiC,β-SiC和少量的游离硅组成,外层由c-AlPO4颗粒构成,内外层结合紧密。复合涂层在1300～1500℃范围内具有良好的抗氧化性能,其氧化激活能为117.2kJ/mol,氧化过程主要受氧在c-AlPO4层中的体扩散速率所控制;氧化气体逸出留下的孔洞是复合涂层防氧化失效的主要原因。
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| 关 键 词： | 磷酸铝 水热电泳沉积 碳化硅 涂层 氧化 |
SiC/c-AlPO_4 MULTI-LAYER COATING ON CARBON/CARBON COMPOSITES AND ITS ANTI-OXIDATION MECHANISM |
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| YANG Wendong,HUANG Jianfeng,CAO Liyun,XIA Changkui.SiC/c-AlPO_4 MULTI-LAYER COATING ON CARBON/CARBON COMPOSITES AND ITS ANTI-OXIDATION MECHANISM[J].Journal of The Chinese Ceramic Society,2010,38(2). |
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| Authors: | YANG Wendong HUANG Jianfeng CAO Liyun XIA Changkui |
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| Affiliation: | Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry;Ministry of Education;Shaanxi University of Science & Technology;Xi'an;710021;China |
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| Abstract: | SiC/cristobalite aluminum phosphate (c-AlPO4) multi-layer coating was prepared on the surface of carbon fiber reinforced carbon (C/C) composites by using combining process of two-step pack cementation process and later hydrothermal electrophoretic deposition process.The phase composition and microstructure of the multi-layer coating were characterized by X-ray diffraction and scanning electron microscopy.The anti-oxidation property,oxidation mechanism and failure mechanism of the multi-layer coating were in... |
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| Keywords: | aluminum phosphate hydrothermal electrophoretic deposition silicon carbide coatings oxidation |
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