192nd Structural Materials Seminar: Dr. David L. Poerschke (University of Minnesota)
On April 17, 2026, Dr. David L. Poerschke (University of Minnesota) gave a lecture at NIMS as the 192nd Structural Materials Seminar.
Dr. David L. Poerschke (Back row, 5th from the right)
- Date and Time
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April 17, Fri. 2026. 13:30~14:30
- Location
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Conference Room, 5th Floor, Advanced Structural Materials Building, NIMS Sengen Site
- Title
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Materials Design to Protect High Temperature Alloys and Composites
- Speaker
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Prof. David L. Poerschke
Department of Chemical Engineering and Materials Science University of Minnesota, Minneapolis, MN
Abstract:
Thermal and environmental barrier coatings (T/EBCs) are used to protect metal and ceramic composite structural components used in the hot section of turbine engines. Recent advances in the design of alloys and composites with higher temperature capability necessitate new T/EBC materials and architectures to meet inter-related (and often competing) performance criteria. We will first discuss the application of thermo-mechanical analysis to screen candidate architecture and property space to identify viable architectures and priorities for new material development. We will then discuss progress in identifying new composite coating materials that could fill property gaps. Experimental screening shows that some phase assemblages sinter quickly while others yield remarkable high-temperature microstructure stability, and that this behavior can be tuned by controlling the average rare earth cation size in systems based on mixed rare earth oxides. At the same time chemical compatibility between layers is important and must be managed. We will discussing considerations for the durability of coatings based on these materials in complex service environments, and the application of these insights to guide next-generation T/EBC design.