| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Microstructural, Mechanical, and Chemical Behavior of Solid Nuclear Fuel and Fuel-Cladding Interface II
|
| Presentation Title |
A Comparative Study of the Third Element Effect in FeCrAl Oxidation and Corrosion |
| Author(s) |
Catherine Lynch, Debashish Sur, Benjamin Redemann, John Scully, Elizabeth Opila |
| On-Site Speaker (Planned) |
Catherine Lynch |
| Abstract Scope |
FeCrAl alloys are a viable alternative accident tolerant fuel cladding to zircaloy due to their performance in moderate and extreme temperatures. Passivation of FeCrAl alloys is enhanced by the third element effect, meaning that the chromia and alumina scales interact with each other for improved performance. In aqueous conditions, the chromia oxides are protective, with their growth aided by aluminum additions. At high temperatures such as during a loss of cooling accident, the alumina scale is protective, aided by chromium additions. This talk will explore the oxide compositions in both aqueous and high temperature environments. Thermogravimetric analysis was used to measure scale growth kinetics between 800-1000°C. Linear sweep voltammetry and electrochemical impedance spectroscopy showed film growth in ambient temperature aqueous conditions. Scanning electron microscopy and x-ray photoelectron spectroscopy were used to characterize the oxides. Chromium and aluminum are mutually beneficial in growing protective scales for accident tolerant fuel cladding. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, High-Temperature Materials, Other |