| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
High Temperature Corrosion and Degradation of Structural Materials
|
| Presentation Title |
High-throughput Investigation of Microstructure & High Temperature Oxidation Behavior of CrMoNbTaW |
| Author(s) |
Md Imran Noor, Paul F. Rottmann |
| On-Site Speaker (Planned) |
Md Imran Noor |
| Abstract Scope |
The search for refractory multi-principal element alloys (RMPEAs) for high temperature applications faces a major challenge in explaining their oxidation behavior due to complex elemental interactions during processing. RMPEAs gain mass by forming an oxide layer as the temperature increases, followed by intergranular oxidation that leads to pesting, and finally lose mass due to the failure of the protective oxide layer. Understanding the nature of the protective oxide layer and the dynamics of oxygen ingress is crucial to explain the structure-property-performance relationships of RMPEAs. In this study, a gradient thin film of CrMoNbTaW was deposited on sapphire using RF magnetron sputtering and analyzed with a range of characterization techniques before and after annealing at temperatures ranging from 800C to 1400C for up to 24 hours. The phase (XRD), composition (SEM-EDS, XPS), microstructure (SEM), oxide phase and morphology (TEM) and mechanical (nanoindentation) properties were characterized to understand the oxidation mechanism. |