Abstract
Iron-chromium-aluminium alloys are of interest to the nuclear materials community due to their resistance to high temperature steam oxidation and good mechanical properties under irradiation. The present work investigates oxide formation on Fe-12Cr-6Al-2Mo-0.2Si-0.03Y alloy at temperatures relevant to light water reactor cladding operation following extended aging to assess growth kinetics, chemical composition, and oxide microstructure. Oxide growth follows a logarithmic time dependence. When the oxidization temperature is 400 °C or below, the oxide is amorphous. At 500 °C or above, crystalline α-Al2O3 oxide film develops and the correlated logarithmic rate constant decreases significantly, indicating enhanced oxidation resistance of the formed oxide film.
| Original language | English |
|---|---|
| Pages (from-to) | 274-283 |
| Number of pages | 10 |
| Journal | Corrosion Science |
| Volume | 157 |
| DOIs | |
| State | Published - Aug 15 2019 |
Funding
This work is supported by the U.S. Department of Energy , Office of Nuclear Energy Fuel Cycle Research and Development Program . Part of the research was performed at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science. Los Alamos National Laboratory is operated by Los Alamos National Security, LLC, for the National Nuclear Security Administration of the U.S. Department of Energy under Contract No. DE-AC52-06NA25396.
| Funders | Funder number |
|---|---|
| U.S. Department of Energy | |
| Office of Science | |
| National Nuclear Security Administration | DE-AC52-06NA25396 |
Keywords
- Amorphous oxide
- Logarithmic time dependence
- Mo segregation
- α-AlO oxide film