| SiCf/SiC复合材料表面梯度抗氧化SiC涂层研究 |
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| 引用本文： | 霍艳丽,崔艳玲,刘海林,胡传奇,黄小婷,陈玉峰,唐婕.SiCf/SiC复合材料表面梯度抗氧化SiC涂层研究[J].人工晶体学报,2017,46(9):1818-1822. |
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| 作者姓名： | 霍艳丽 崔艳玲 刘海林 胡传奇 黄小婷 陈玉峰 唐婕 |
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| 作者单位： | 中国建筑材料科学研究总院,北京,100024;河南省建筑科学研究院有限公司,郑州,450000 |
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| 摘 要： | SiC纤维增强SiC陶瓷基复合材料(简称SiCf/SiC复合材料)具有低密度、高温稳定性、抗氧化性、高耐腐蚀性等特点,在航天及航空发动机热结构部件及核聚变反应堆炉第一壁结构等方面有巨大的潜在用途.目前受工艺条件制约,SiCf/SiC复合材料中用来增强的SiC纤维纯度不高,C/Si原子比大于1.3,而采用传统先驱体浸渍裂解工艺(简称PIP)制备的基体材料除了纯度不高外,还含有孔隙和缺陷,不能满足高温氧化环境中服役要求.本文通过化学气相沉积工艺(CVD)在SiCf/SiC复合材料表面制备出一种高纯、低缺陷、耐高温、低氧扩散系数且与基体材料具有良好匹配性的SiC抗氧化梯度涂层,通过SEM分析基体与膜层的结合情况及涂层的微观形貌,通过XRD考察涂层的梯度组份及氧化前后涂层成份变化,进而探讨梯度涂层抗氧化机理.
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| 关 键 词： | SiC/SiC复合材料 涂层 CVD 抗氧化 |
Study of Antioxidants Variation of Gradient SiC Coating on SiCf/SiC Composites |
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| HUO Yan-li,CUI Yan-ling,LIU Hai-lin,HU Chuan-qi,HUANG Xiao-ting,CHEN Yu-feng,TANG Jie.Study of Antioxidants Variation of Gradient SiC Coating on SiCf/SiC Composites[J].Journal of Synthetic Crystals,2017,46(9):1818-1822. |
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| Authors: | HUO Yan-li CUI Yan-ling LIU Hai-lin HU Chuan-qi HUANG Xiao-ting CHEN Yu-feng TANG Jie |
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| Abstract: | SiC f/SiC composite material with low density , stability at elevated temperature , oxidation resistance , high corrosion resistance and other characteristics , has huge potential in use of the space and structure of aero engine components and nuclear fusion reactor first wall structure .At present , limited by process conditions , the atom ratio of C to Si is more than 1.3, and there are pore and defects in the SiC f/SiC composite .So that it can't meet the service requirements of high temperature oxidation environment . In this paper, a graded coating with a high purity , low defect, high temperature resistant , anti-oxidation, low hypoxia diffusion coefficient and good matching with substrate , had been prepared by chemical vapor deposition ( CVD) on the surface of SiC/SiC composite material .And SEM was used to observe the microstructure of coating and the binding properties on coating and SiC /SiC substrate .XRD was used to characterize the component of the gradient coating and the changes of component when the coating was oxidized.And then the gradient coating anti-oxidant mechanism was discussed . |
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| Keywords: | SiC f/SiC composite coating CVD anti-oxidation |
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