无机材料学报

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CMC-EBC损伤耦合机理及一体化设计研究进展

方光武1,2, 谢浩元2, 张华军3, 高希光2, 宋迎东2   

  1. 1.南京航空航天大学 通用航空与飞行学院,溧阳 213300;
    2.南京航空航天大学 航空发动机热环境与热结构工业和信息化部重点实验室, 南京 210016;
    3.中国人民解放军第二军事代表处,成都 610000
  • 收稿日期:2024-01-03 修回日期:2024-03-11 出版日期:2024-03-22 网络出版日期:2024-03-22
  • 基金资助:
    国家科技重大专项(Y2019-I-0018-0017)

Progress of Damage Coupling Mechanism and Integrated Design Method for CMC-EBC

FANG Guangwu1,2, XIE Haoyuan2, ZHANG Huajun3, GAO Xiguang2, SONG Yingdong2   

  1. 1. College of General Aviation and Flight, Nanjing University of Aeronautics and Astronautics, Liyang, Jiangsu 213300, China;
    2. Key Laboratory of Aero-engine Thermal Environment and Structure, Ministry of Industry and Information Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
    3. Second Military Representative Office of the Chinese People’s Liberation Army, Chengdu 610000, China;
  • Received:2024-01-03 Revised:2024-03-11 Published:2024-03-22 Online:2024-03-22
  • Supported by:
    National Science and Technology Major Project (Y2019-I-0018-0017)

摘要: 陶瓷基复合材料与环境障碍涂层组合(CMC-EBC)是目前航空航天领域最具应用前景的热结构材料体系。本文对CMC-EBC失效机理与分析模型的研究进展进行综述。首先,简要回顾了CMC-EBC材料体系的发展及主要制备工艺。然后,综述了CMC-EBC在服役环境下的主要损伤模式与失效机理,总结发现CMC预制体结构和孔洞缺陷会和EBC涂层内裂纹等损伤演化相互影响,这种细观损伤模式的耦合是决定其寿命的关键因素之一,但目前的机理研究主要集中于涂层本身性能考核及其受环境因素的影响,缺乏对涂层和复合材料编制结构在损伤演化过程中协同效应的考虑。接下来,详细分析了CMC-EBC的失效模拟与预测模型研究的历史与现状,指出其中存在的问题,包括环境因素建模方法和损伤耦合演化模拟技术。目前大部分工作致力于分别开发CMC和EBC的失效模型,而对于CMC-EBC构件的失效预测应考虑其损伤演化与微观结构之间的相互耦合影响。最后,对CMC-EBC材料体系研发与服役性能预测方法进行了展望,认为CMC本体和EBC涂层失效模式相互耦合,开展结构功能一体化设计和分析是对CMC-EBC构件研究的趋势。

关键词: 陶瓷基复合材料, 环境障碍涂层, 损伤耦合, 失效模型, 一体化设计, 综述

Abstract: The integration of Ceramic Matrix Composites with Environmental Barrier Coatings (CMC-EBC) represents the most promising thermal structural material system in the aerospace field. This paper provides an overview of the advancements in research on the failure mechanisms and numerical models of CMC-EBC. It commences with a concise review of the evolution and primary fabrication techniques of the CMC-EBC material system. Subsequently, it summarizes the typical damage modes and failure mechanisms of CMC-EBC under operational conditions, identifying that the interplay between the CMC preform structure, porosity defects, and EBC coating cracks is a critical determinant of the material's lifespan. However, current mechanistic studies are chiefly focused on the performance evaluation of the coating itself and its susceptibility to environmental factors, disregarding the synergistic effects of the coating and composite architecture during damage progression.The review proceeds with an examination of the history and current status of research on failure simulation and prediction models for CMC-EBC, highlighting issues related to modeling environmental factors and simulating coupled damage evolution. While much effort has directly developed separate failure models for CMC and EBC, predicting the failure of CMC-EBC components should account for the coupling effects between damage evolution and microstructure.In conclusion, the review offers a perspective on the development and service performance prediction methods for the CMC-EBC system. It points out that considering the interdependent failure modes of the CMC substrate and EBC coating is pivotal. Integrated design and analysis of structural and functional aspects are emerging trends in CMC-EBC component research.

Key words: ceramic matrix composite, environmental barrier coating, damage coupling, failure model, integrated design, review

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