| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
2025 Technical Division Student Poster Contest
|
| Presentation Title |
SPU-29: Developing a High Temperature Alumina-Forming Bond Coat Alloy in the Nb-Si-Al-Ti-Mo-Cr Composition Space |
| Author(s) |
Eddy Rao, Melina Endsley, Collin Holgate, Tresa Pollock |
| On-Site Speaker (Planned) |
Eddy Rao |
| Abstract Scope |
Niobium-silicides, a class of refractory multi-principal element alloys, are promising candidates to supersede Ni-based superalloys used in gas turbine engines. While these alloys exhibit robust mechanical properties, they oxidize rapidly at elevated temperatures and therefore require a protective bond coat. This bond coat must form a regenerative alumina-scale and be thermochemically compatible with the substrate alloy. In this work, thermodynamic modeling (CALPHAD) was used to explore alumina-forming alloys in the Nb-Si-Al-Ti-Mo-Cr composition space. Alloy down selection was guided using calculated Al-activities (as a metric for predicting oxide formation) and alloy phase constitution. Promising alloy candidates were identified, synthesized via arc-melting, and tested for their oxidation performance. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
High-Temperature Materials, |