Oxide evolution on Alloy X-750 in simulated BWR environment
| Autor: | Fang Liu, Kenneth Göransson, Krystyna Marta Stiller, Seikh Mohammad Habibur Rahman, Mattias Thuvander, Sten Eriksson, Silvia Tuzi |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Nuclear and High Energy Physics Materials science Nickel oxide Metallurgy Alloy Spinel Oxide 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Corrosion chemistry.chemical_compound Nuclear Energy and Engineering chemistry 0103 physical sciences engineering Boiling water reactor General Materials Science Composite material 0210 nano-technology Dissolution |
| Zdroj: | Journal of Nuclear Materials. 482:19-27 |
| ISSN: | 0022-3115 |
| Popis: | In order to simulate the environment experienced by spacer grids in a boiling water reactor (BWR), specimens of the Ni-based Alloy X-750 were exposed to a water jet in an autoclave at a temperature of 286 degrees C and a pressure of 80 bar. The oxide microstructure of specimens exposed for 2 h, 24 h, 168 h and 840 h has been investigated mainly using electron microscopy. The specimens suffer mass loss due to dissolution during exposure. At the same time a complex layered oxide develops. After the longest exposure the oxide consists of two outer spinel layers consisting of blocky crystals, one intermediate layer of nickel oxide interspersed with Ti-rich oxide needles, and an inner layer of oxidized base metal. The evolution of the oxide leading up to this structure is discussed and a model is presented. |
| Databáze: | OpenAIRE |
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