About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
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Symposium
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High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond II
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Presentation Title |
Enhanced Oxidation Resistance of (Mo95W5)85Ta10(TiZr)5 Refractory Metal 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 of 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. A two-step coating process (including a Mo precoating and a Si-B pack cementation) was applied to an innovative refractory multi-principal element alloy (MPEA) (Mo95W5)85Ta10(TiZr)5. The coating is composed of an aluminoborosilica glass layer on top of a MPEA-Si-B multilayered structure. The coating effectively protects the MPEA 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. |