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

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 sys-第*期 李 平, 等: 《无机材料学报》写作及排版规范 2 tem.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.