About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Environmental Degradation of Multiple Principal Component Materials
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Presentation Title |
Combinatorial Synthesis of Non-equiatomic CrMoNbTaW With Improved Strength and Oxidation Resistance |
Author(s) |
Md Imran Noor, Paul F. Rottmann |
On-Site Speaker (Planned) |
Md Imran Noor |
Abstract Scope |
Developing multi-principal element alloys for extreme environment applications is challenging due to the complex atomic interactions that are difficult to extrapolate from the properties of their constituent elements. Understanding both the phases present in oxidation products along with their properties and morphology requires experimental characterization. Equiatomic CrMoNbTaW has shown promising oxidation resistance at temperatures exceeding 1000℃ due to the formation of the protective oxide CrTaO4. However, the high temperature properties of its non-equiatomic compositions are not well understood. In this study, compositionally combinatorial CrMoNbTaW thin films were fabricated using RF magnetron sputtering. The films were characterized before and after annealing 6 hours at temperatures from 750℃ to 1400℃. To evaluate the thermodynamically stable phases as a function of composition, phase analysis (XRD), composition analysis (EDS, XPS), microstructure examination (SEM), oxide phase and morphology observation (TEM) were conducted and correlated to mechanical properties measured via nanoindentation. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Temperature Materials, High-Entropy Alloys, Thin Films and Interfaces |