About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Refractory Metals 2026 – A Memorial to Todd Leonhardt
|
| Presentation Title |
CrTaO4-Mediated Oxidation Resistance of Ta-Cr Alloys in Atmospheric and Reduced pO2 |
| Author(s) |
Matthew Foong, Andrew Zang, Daniel R. Mumm |
| On-Site Speaker (Planned) |
Matthew Foong |
| Abstract Scope |
The wider use of refractory alloys is prevented in large part by their exceptionally poor oxidation resistance. The thermal growth of complex oxides has demonstrated viability in remedying this shortcoming, as complex oxides can consume deleterious and volatile refractory simple oxides while providing some protective measure of their own. This work examines the formation mechanisms by which CrTaO4 forms on binary Ta-Cr alloys through controlled-environment oxidation experiments, x-ray diffraction, and high-resolution scanning and transmission electron microscopy. Specifically, the evolution of the CrTaO4 thermally-grown oxide is probed as a function of time, temperature, and environmental conditions. Additionally, future efforts dedicated towards developing an overall strategy for complex-oxide growing refractory alloys that could be designed and tailored for use as protective coatings on emerging refractory high entropy/compositionally complex alloys, akin to MCrAlY bond coats on Ni-based superalloys, are discussed. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
High-Temperature Materials, Surface Modification and Coatings, Environmental Effects |