| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Refractory Metals 2023
|
| Presentation Title |
New Environmental-thermal Barrier Coatings for Ultrahigh Temperature Alloys |
| Author(s) |
Hua Xie, Victor Champagne, Wei Zhong, Bryson Clifford, Yunhui Gong, David Clarke, Liangbing Hu, Ji-Cheng Zhao |
| On-Site Speaker (Planned) |
Hua Xie |
| Abstract Scope |
An ultrafast high-temperature sintering (UHS) method (Science, 368 (2020) 521) was employed to perform fast exploration of new environmental-thermal barrier coatings (ETBCs) for ultrahigh temperature refractory alloys to be used in the harsh turbine environments. UHS enables ultrafast synthesis of high-melting oxide coatings, including multilayers, often in minutes instead of hours, and thus breaks through the bottleneck preventing the rapid evaluation of such coatings. UHS together with fast-fail tests as well as modeling enabled our team to cast a wide net of compositions and coating architectures in order to design and optimize 1700°C-capable coatings that have good expansion match with the substrates and are resistant to high velocity oxidizing, moisture-containing gas flows present in turbines. Dozens of ETBCs have been fabricated on both polycrystalline SiC and coated C103 Nb-based alloy substrates, and tested for stability and resistance to thermal cycling. Our project is part of the ARPA-E ULTIMATE Program. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Surface Modification and Coatings, High-Temperature Materials, Ceramics |