Environmental barrier coatings (EBCs) on ceramic matrix composites (CMCs) have been implemented into commercial aviation products with their durability playing an important role in component performance over time. Understanding degradation modes and their potential impact on coating life will play an important role in designing coating architectures and assessing coating life. Potential degradation modes that impact EBC durability and performance include microstructure changes from oxidation or evolution over time (e.g. EBC densification or devitrification of SiO2-based thermally grown oxides), CMAS-based reactions, exposure to thermal gradients and thermal shock conditions, and volatilization.
The impact of new coating compositions and processing methods on EBC performance along with EBCs with performance capabilities beyond those for melt-infiltrated SiC/SiC CMCs is another topic of interest, including hypersonic or reusable applications. Experimental and modeling approaches to understanding coating degradation, including advanced characterization methods, can either be a stand-alone topic or part of the evaluation process for different EBC systems.
Proposed sessions and topics of interest:
- Performance and coating evolution at extreme conditions (e.g. oxidation and/or corrosion, higher temperatures, thermal gradients and/or thermal shock)
- CMAS reactions with EBC compositions and their thermomechanical impacts
- Thermomechanical and/or thermochemical modeling of degradation mechanisms
- In-situ characterization or measurement of evolving coating properties
- New coating processing techniques and their effects on coating properties and degradation modes
- Theoretical or experimental approaches to develop new EBC compositions
Organizers:
- Anant Setlur, GE Aerospace, USA; setlur@ge.com
- Kang N. Lee, NASA-Glenn Research Center, USA
- Chen, National Research Council-Canada, Canada
- Godbole, GE Aerospace, USA
- Poerschke, University of Minnesota, USA
- Vassen, Forschungszentrum Jülich GmBH, Germany
- Wan, GE Aerospace, USA
- Jie Zhang, Institute of Metal Research, Chinese Academy of Sciences, China
- Makoto Hasegawa Yokohama National University, Japan
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