About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Refractory Metals 2024
|
Presentation Title |
Influence of Doping on the Scale Growth and Oxidation Resistance of CrTaO4 Forming Alloys |
Author(s) |
Fabian Lanoy, Emma White, Björn Schäfer, Bronislava Gorr, Mathias Christian Galetz |
On-Site Speaker (Planned) |
Fabian Lanoy |
Abstract Scope |
Beyond the classic protective oxides, e.g. alumina, chromia and silica, more complex oxides, such as CrTaO4, have been shown to play a key role in high temperature oxidation resistance. Thin and continuous CrTaO4 layers have been observed on refractory high entropy alloys and Ni-based alloys. With their rutile structure, these CrTaO4 layers grow through inward diffusion of oxygen in the crystal lattice. Potentially a reduction of oxygen vacancies in CrTaO4 would decrease the oxide scale growth and improve the oxidation resistance of alloys that form CrTaO4. The refractory high entropy alloy CrTaTiAlMo was doped with elements of different oxide valences to characterize the influence on the oxide scale growth. These doped alloys were isothermally oxidized in Ar-O2 atmospheres with differing oxygen partial pressures above 1000°C and characterized to study the influence of the dopants on the oxide scale growth mechanisms. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, High-Temperature Materials, Other |