About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Multiple Principal Component Materials
|
| Presentation Title |
Tantalate as a Novel Grown Oxide to Protect Refractory Metal Alloys |
| Author(s) |
Fabian Lanoy, Emma White, Björn Schäfer, Chongchong Tang, Carsten Schroer, Bronislava Gorr, Mathias C. Galetz |
| On-Site Speaker (Planned) |
Mathias C. Galetz |
| Abstract Scope |
Novel refractory alloys, such as TaMoCrTiAl, could enable an increase in the maximum operating temperature of aircraft or power plant components, thereby enhancing their efficiencies. Beyond the mechanical properties at high temperatures, oxidation resistance is one of the properties that limit the usability of refractory alloys in the high-temperature range. The oxidation resistance of high-temperature alloys relies on the formation of a closed, slow-growing top layer that separates the metal from the corrosive atmosphere. Usually, α-Al2O3 and Cr2O3, and (to a limited extent) amorphous SiO2 are used as protective layers. An alternative complex oxide, CrTaO4, observed on TaMoCrTiAl was investigated and offers interesting properties as a protective top layer for refractory systems, which have been challenging to protect above 1000 °C so far. Such CrTa-based oxides are investigated not only on TaMoCrTiAl, but on various alloys such as Cr20Ta, Ni20Cr20Ta, Fe20Cr20Ta, and Co20Cr20Ta. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, High-Entropy Alloys, Environmental Effects |