About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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Environmental Degradation of Multiple Principal Component Materials
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Presentation Title |
Enhanced Oxidation Resistance of (Mo95W5)85Ta10(TiZr)5 Refractory Multi-principal Element Alloy up to 1300°C |
Author(s) |
Ranran Su, Hongliang Zhang, Gaoyuan Ouyang, Longfei Liu, Jun Cui, Duane D. Johnson, John H. Perepezko |
On-Site Speaker (Planned) |
Ranran Su |
Abstract Scope |
Refractory-metal-based alloys are a potential replacement for current nickel-based superalloys due to their excellent mechanical strength at extremely high temperatures. However, severe oxidation in a high-temperature working environment limits their application. To address this challenge, a two-step coating process (including a Mo precoat and a Si-B pack cementation) was applied to an innovative refractory multi-principal element alloy (RMPEA) (Mo95W5)85Ta10(TiZr)5. The coating is composed of an aluminoborosilica glass layer on top of an RMPEA-Si-B multilayered structure. The coating effectively protects the RMPEA from oxidation in high-temperature environments, as demonstrated by phase-stable operation at 10-20% higher temperatures over state-of-the-art systems without any forced-cooling system. This two-step Mo-Si-B coating method can be adapted to provide environmental resistance to a wide range of RMPEA. |
Proceedings Inclusion? |
Planned: |
Keywords |
Surface Modification and Coatings, High-Temperature Materials, |