[1]张俊敏,陈小武,杨金山,等.Y2O3 改性SiC 陶瓷高温水氧行为研究[J].中国材料进展,2023,42(06):456-463.[doi:10.7502/j.issn.1674-3962.202209013]
 ZHANG Junmin,CHEN Xiaowu,YANG Jinshan,et al.Oxidation Behavior in Wet Oxygen Environment of Y2O3 Modified SiC Ceramics[J].MATERIALS CHINA,2023,42(06):456-463.[doi:10.7502/j.issn.1674-3962.202209013]
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Y2O3 改性SiC 陶瓷高温水氧行为研究()
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
42
期数:
2023年第06期
页码:
456-463
栏目:
出版日期:
2023-06-30

文章信息/Info

Title:
Oxidation Behavior in Wet Oxygen Environment of Y2O3 Modified SiC Ceramics
文章编号:
1674-3962(2023)06-0456-08
作者:
张俊敏123 陈小武12 杨金山12 张翔宇12 阚艳梅12廖春景12 胡建宝12 周海军12 董绍明12
1. 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 2. 中国科学院上海硅酸盐研究所 结构陶瓷及复合材料工程研究中心, 上海 200050 3. 上海科技大学物质科学与技术学院, 上海 200031
Author(s):
ZHANG Junmin123 CHEN Xiaowu12 YANG Jinshan12 ZHANG Xiangyu12 KAN Yanmei12 LIAO Chunjing12 HU Jianbao12ZHOU Haijun12 DONG Shaoming12
1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China 2. Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics,Chinese Academy of Sciences, Shanghai 200050, China 3. School of Physical Science and Technology,ShanghaiTech University,Shanghai 200031, China
关键词:
SiC 陶瓷 高温水氧环境 水氧行为 耐水氧侵蚀机理 连续Y2 Si2 O7 层
Keywords:
SiC ceramics high-temperature wet oxygen environment wet-oxidation behavior wet-oxidation resistance mechanism continuous Y2Si2O7 layer
分类号:
TB332; V23
DOI:
10.7502/j.issn.1674-3962.202209013
文献标志码:
A
摘要:
连续碳化硅纤维增强碳化硅陶瓷基复合材料(SiCf / SiC)因高温水氧侵蚀致使力学性能急剧下降, 限制了其热端部件在航空发动机中的长寿命服役。研究证实, 该侵蚀主要表现为SiC 基体和纤维与水、氧气反应生成气相Si(OH)4 , 导致质量耗散。因此, 从组分、结构调控角度提升SiC 耐水氧侵蚀性能已成为研究热点。对比研究了添加和未添加Y2 O3 对SiC 陶瓷水氧侵蚀行为的影响。与SiC 陶瓷相比, SiC-Y2 O3 陶瓷的氧化速率及挥发速率均明显下降, 且随着氧化温度的升高, 两者差距愈发明显, 可见添加Y2 O3 后SiC 陶瓷的耐水氧侵蚀性能得到明显改善。氧化后的陶瓷微观结构表明, SiC-Y2 O3 陶瓷氧化层明显更薄且更致密, 进一步分析表明这主要由Y 组分在陶瓷表面的迁移以及聚集所致。在侵蚀过程中, 陶瓷内部的Y2 O3 会 向SiC 陶瓷表面迁移, 并与SiO2 反应形成β-Y2 Si2 O7 , 并逐渐聚集形成连续的Y2 Si2 O7 层。因此, 在氧化层与SiC 陶瓷交界处形成了一个富Y2 Si2 O7 / 富Y2 O3层。多层含Y 氧化层在陶瓷表面形成水氧阻挡屏障, 有效抑制了水氧介质向陶瓷内部的渗透与侵蚀。该研究结果为SiCf / SiC 复合材料的耐水氧结构设计与调控提供了重要思路。
Abstract:
The mechanical properties of continuous silicon carbide fiber reinforced silicon carbide matrix composites(SiCf / SiC) decrease rapidly under high-temperature wet oxygen environment due to the corrosion from wet oxygen,which limits the long-life service of the hot end components in aero-engines. It is confirmed that the corrosion of SiC generates gas phase Si(OH)4, which leads to mass dissipation.Therefore, it has been a research hotpot that how to improve the wet-oxidation resistance in terms of composition and structure regulation. This paper contrasted the oxidation behaviors of SiC ceramics with and without Y2O3 addition under wet oxygen environment. Compared with SiC ceramics, the oxidation rates and the volatilization rates of SiC-Y2O3 ceramics decrease significantly and the difference between the two becomes more obvious with the increase of oxidation temperature. It can be seen that the wet-oxidation resistance of SiC ceramics is improved dramatically by adding Y2O3. The microstructures analyses show that the oxide layer of SiC-Y2O3 ceramics is thinner and denser. The further analyses indicate that these results from the migration and aggregation of Y-contained phase towards the surface of SiC-Y2O3 ceramics. During the oxidation process, the Y2O3 in the ceramic can migrate to the surface and react with SiO2 to form β-Y2Si2O7. Finally, the β-Y2Si2O7 aggregates on the surface of the oxide layer to form a continuous β-Y2Si2O7 layer. Therefore, a Y2Si2O7 / Y2O3-rich layer is formed at the junction of the oxide layer and the ceramic matrix.The multilayer Y-contained layers can inhibit the corrosion of wet oxygen spreading to the inner matrix. This study provides important ideas for the design and regulation of wet-oxidation resistant SiCf / SiC composites.

备注/Memo

备注/Memo:
收稿日期: 2022-09-08  修回日期: 2022-11-19 基金项目: 国家自然科学基金资助项目(51902328, 52172111);国家科技重大专项(2017-IV-0005-0042); 上海市科技创新行动计划项目(21511104800,21511103200) 第一作者: 张俊敏, 男, 1996 年生, 博士研究生 通讯作者: 陈小武, 男, 1990 年生, 副研究员, Email: xwchen@ mail. sic. ac. cn 董绍明, 男, 1962 年生, 中国工程院院士, 博士生导师, Email: smdong@ mail. sic. ac. cn
更新日期/Last Update: 2023-07-27