About this Abstract |
Meeting |
2023 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 |
Investigation of Spinel Phase Formation on Ni-doped FeCrAl Alloy in Multiple Environments |
Author(s) |
Rajnikant Umretiya, Andrew Hoffman, Richard Blair, Robert Motly, Timothy Jurewicz, Raul Rebak |
On-Site Speaker (Planned) |
Rajnikant Umretiya |
Abstract Scope |
FeCrAl alloys are considered as lead Accident Tolerant Fuel (ATF) candidate because of their ability to form a passive Al film during high temperature exposure above ~800C. Additionally, FeCrAl alloys are highly corrosion resistant in hydrothermal exposures due to the formation of a protective oxide film which is two-layer structure, consist of outer oxide layer with porous Fe3O4 and inner oxide layers with compact polycrystalline FeCr2O4. The oxygen (O) can diffuse through this spinel layers to form Cr2O3 on the bulk surface, which protects the bulk from further oxygen diffusion and oxidation. Recently, it was found that in the irradiative environment, Fe-based spinel is not stable; however, NiFe2O4 is stable due to the stability of which over a large ECP and pH range in the E-pH (pourbaix) diagram. Thus, this study explores the formation/stability of NiFe2O4 spinel in Ni added FeCrAl alloys after exposure in different non-irradiated corrosion environments. |
Proceedings Inclusion? |
Planned: |