Kinetics of interfacial reactions in molten U/solid Y2O3 system
| Autor: | N. Eustathopoulos, F. Le Guyadec, C. Tournier, B. Lorrain, L. Coudurier |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Nuclear and High Energy Physics
Inorganic chemistry Oxide Evaporation chemistry.chemical_element Actinide Uranium Oxygen Metal chemistry.chemical_compound Nuclear Energy and Engineering chemistry visual_art visual_art.visual_art_medium General Materials Science Yttria-stabilized zirconia Stoichiometry Nuclear chemistry |
| Zdroj: | Journal of Nuclear Materials. 254:215-220 |
| ISSN: | 0022-3115 |
| DOI: | 10.1016/s0022-3115(97)00366-8 |
| Popis: | The reactivity between liquid uranium and polycrystalline yttria substrates of various grain-sizes is studied at 1673 K under high vacuum–low pO2 conditions ( p O 2 ≈10 −7 Pa ). At short contact times, uranium oxidation occurs at the metal/oxide interface from oxygen transferred from the yttria substrate which is transformed to an under-stoichiometric state. At long contact times, deoxidation occurring at the uranium free surface predominates and leads to complete elimination of oxidized uranium by a dissolution–evaporation mechanism. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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