About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Materials for Energy Conversion and Storage 2023
|
Presentation Title |
D-9: Novel Thermal Barrier Coatings Stable up to 1700°C |
Author(s) |
Melina A. Endsley, Thomas J. Drtina, Erin Lewis, Collin S. Holgate, Akane Suzuki, Joshua L. Margolies, Carlos G. Levi, Tresa M. Pollock |
On-Site Speaker (Planned) |
Melina A. Endsley |
Abstract Scope |
Advanced thermal barrier coatings (TBCs) enable natural gas turbines to operate at higher temperatures and therefore higher efficiencies. A TBC must exhibit multiple, often competing, properties, including: thermochemical compatibility with the thermally grown aluminum oxide generated by the bond coat, strain tolerance, typically requiring low in-plane compliance as needed to moderate CTE mismatch as well as high sintering resistance, and high toughness. Novel TBC compositions based on rare-earth stabilized HfO2 or ZrO2 have been synthesized and investigated using diffusion couples, electron microscopy, dilatometry, and indentation. While the compositions initially investigated exhibit shortcomings, mitigating strategies using bilayer coatings have been implemented and will be discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Surface Modification and Coatings, High-Temperature Materials, |