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| 层状硅酸钇改性SiCf/SiC复合材料湿氧化行为研究 | |
| 引用本文： | 王鹏,王庆雷,张翔宇,杨金山,周海军,胡建宝,丁玉生,董绍明.层状硅酸钇改性SiCf/SiC复合材料湿氧化行为研究[J].无机材料学报,2019,34(8):904-908. |
| 作者姓名： | 王鹏 王庆雷 张翔宇 杨金山 周海军 胡建宝 丁玉生 董绍明 |
| 作者单位： | 中国科学院 上海硅酸盐研究所, 高性能陶瓷与超微结构国家重点实验室, 上海 200050 中国科学院大学 材料与光电研究中心, 北京100049 北京空间机电研究所, 北京 100076 |
| 摘 要： | 研究了层状硅酸钇的引入对SiCf/SiC复合材料湿氧化行为的影响。首先通过硝酸钇乙醇溶液浸渍热解法向碳化硅纤维引入Y2O3, 再采用化学气相渗透法沉积SiC。层状Y2Si2O7主要通过Y2O3与沉积过程中的SiC反应转化而成。研究发现, Y2Si2O7在1400 ℃湿氧环境条件下发生富集, 在氧化层表面形成保护层。氧化80 h后, 单层和多层Y2Si2O7改性的SiCf/SiC复合材料强度保留率分别达到60.38%和71.93%, 而没有改性的SiCf/SiC复合材料强度保留率仅为50.11%。结果表明: 层状Y2Si2O7的引入可显著提升SiCf/SiC复合材料在湿氧环境的抗氧化性能。 |
| 关 键 词： | 陶瓷基复合材料 稀土硅酸盐 氧化 |
| 收稿时间： | 2018-12-17 |
Oxidation Behavior of SiCf/SiC Composites Modified by Layered-Y2Si2O7 in Wet Oxygen Environment |
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| WANG Peng,WANG Qing-Lei,ZHANG Xiang-Yu,YANG Jin-Shan,ZHOU Hai-Jun,HU Jian-Bao,DING Yu-Sheng,DONG Shao-Ming.Oxidation Behavior of SiCf/SiC Composites Modified by Layered-Y2Si2O7 in Wet Oxygen Environment[J].Journal of Inorganic Materials,2019,34(8):904-908. | |
| Authors: | WANG Peng WANG Qing-Lei ZHANG Xiang-Yu YANG Jin-Shan ZHOU Hai-Jun HU Jian-Bao DING Yu-Sheng DONG Shao-Ming |
| Affiliation: | State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China Beijing Institute of Space Mechanics & Electricity, Beijing 100076, China; |
| Abstract: | SiCf/SiC composites modified by layered Y2Si2O7 were presented in this research. Layered Y2Si2O7 was transformed from yttrium oxide by chemical vapor infiltration process in SiC fiber preform, in which yttrium oxide was generated by the solution impregnation and pyrolysis method. Oxidation behavior of the layered-Y2Si2O7 modified SiCf/SiC composites was studied in the wet oxygen environment at 1400 ℃, showing that Y2Si2O7 can concentrate on the oxidation surface to form a protective layer during the oxidation process. The bending strengths of SiCf/SiC composites with one layer or three layers of Y2Si2O7 remain 60.38% and 71.93%, respectively, after the oxidation for 80 h. In contrast, it is only 50.11% for SiCf/SiC composites without Y2Si2O7. Therefore, layered distribution of Y2Si2O7 significantly improves the oxidation resistance of SiCf/SiC composites in wet oxygen environment. |
| Keywords: | ceramic composites rare-earth silicate oxidation |
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