About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
2026 Technical Division Student Poster Contest
|
| Presentation Title |
SPU-36: Analyzing the Role of Si on the Oxidation Behavior of Nb-Ti-Mo-Cr-Si-Al Alloys at Intermediate Temperatures |
| Author(s) |
Eddy Rao, Melina Endsley, Collin Holgate, Tresa Pollock |
| On-Site Speaker (Planned) |
Eddy Rao |
| Abstract Scope |
Niobium-based refractory multi-principal element alloys (RMPEAs) are promising candidates for superseding Ni-based super alloys in gas turbine engines due their strength at extreme temperatures. However, the application of these alloys is hindered by poor oxidation performance at intended operating temperatures, necessitating an alumina-forming bond coating. Our recent research has demonstrated that Si plays a beneficial role in the oxidation performance of bond coatings in the Nb-Ti-Mo-Cr-Si-Al compositional domain at intermediate temperatures (1000°C - 1400°C). CALPHAD simulations were conducted to predict the effect of varying Si content on oxidation performance in existing alumina-forming alloys. Compositions of interest were identified, synthesized via arc-melting, and isothermally tested for their oxidation performance. Comparisons are drawn between CALPHAD predictions and experimental results, and metrics used to predict oxidation performance are evaluated. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
High-Temperature Materials, Environmental Effects, High-Entropy Alloys |