AI Article Synopsis
- The study focuses on the degradation mechanisms of environmental barrier coatings (EBCs) used in high-temperature conditions, specifically for aero-engine blades, under water vapor corrosion.
- A new theoretical model is developed that combines factors like deformation, mass diffusion, and chemical reactions to analyze the corrosion process of EBC systems.
- Findings indicate that water vapor diffusion primarily influences the corrosion, leading to observable differences between corroded and un-corroded areas, particularly in rare-earth silicate EBC systems.
Article Abstract
The degradation mechanisms for environmental barrier coatings (EBCs) under high-temperature water vapour conditions are vital for the service of aero-engine blades. This study proposes a theoretical model of high-temperature water vapour corrosion coupled with deformation, mass diffusion and chemical reaction based on the continuum thermodynamics and the actual water vapour corrosion mechanisms of an EBC system. The theoretical model is suitable for solving the stress and strain fields, water vapour concentration distribution and coating corrosion degree of an EBC system during the water vapour corrosion process. The results show that the thickness of the corrosion zone on the top of the EBC system depended on water vapour diffusion, which had the greatest influence on the corrosion process. The top corroded area of the rare-earth silicate EBC system was significantly evident, and there was a clear dividing line between the un-corroded and corroded regions.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8510403 | PMC |
| http://dx.doi.org/10.3390/ma14195907 | DOI Listing |
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