About this Abstract |
Meeting |
MS&T25: Materials Science & Technology
|
Symposium
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Understanding Corrosion-Related Cracking
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Presentation Title |
Phase-Field Modeling of Oxidation and Cracking in Environmental Barrier Coatings |
Author(s) |
Tianle Cheng, Fei Xue, Yinkai Lei, Richard P. Oleksak, Youhai Wen |
On-Site Speaker (Planned) |
Youhai Wen |
Abstract Scope |
The advent of next-generation engines necessitates materials capable of withstanding temperatures beyond the reach of current superalloys. SiC-based ceramic matrix composites, augmented with environmental barrier coatings (EBCs), present a promising materials solution. Given the active search for effective and durable EBCs, there is a pressing need for modeling tools to understand and predict damage evolution in these materials to help accelerate their development. This study introduces a phase-field model (PFM) designed to simulate the critical role of thermally grown oxides (TGO) in the degradation and failure of EBCs. The model accounts for the severe volume expansion due to oxidation, alongside phase transformations and microstructural evolution during thermal cycling, offering a comprehensive view of the damage processes. Simulation results are validated against experimental findings reported in the literature, establishing the model's potential as a significant tool for understanding and improving the resilience of EBCs in cyclic oxidative environments. |