Microstructure evolution and phase transformation of heavy-ion irradiated U–Mo/Al fuels
| Autor: | D. Drouan, Jingyi Shi, H. Breitkreutz, Xavière Iltis, C. Onofri, H. Palancher, Winfried Petry |
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| Rok vydání: | 2020 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Analytical chemistry Energy-dispersive X-ray spectroscopy 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 01 natural sciences 010305 fluids & plasmas Amorphous solid Crystallinity Nuclear Energy and Engineering Transmission electron microscopy Phase (matter) 0103 physical sciences General Materials Science Irradiation 0210 nano-technology Layer (electronics) |
| Zdroj: | Journal of Nuclear Materials. 541:152399 |
| ISSN: | 0022-3115 |
| DOI: | 10.1016/j.jnucmat.2020.152399 |
| Popis: | The microstructure evolution and phase transformation of the interdiffusion layer resulting from the interaction between U–Mo and Al in U–Mo/Al bilayer systems irradiated from 140 °C to 275 °C are discussed. Heavy ion irradiation was used as a convenient tool to produce an interdiffusion layer comparable to those occurring during in-pile irradiation. A burn-up equivalent of up to ∼ 7.7 × 10 20 f / cm 3 has been reached to simulate the early in-pile irradiation. Scanning and transmission electron microscopy coupled with energy dispersive spectroscopy were performed to determine the phase and the composition of the induced interdiffusion layer. The present analysis reveals that the U–Mo/Al interdiffusion layer is completely amorphous up to an irradiation temperature of 200 °C. In our experimental geometry, nanograins start to form from 220 °C, propagating from the Al layer towards the U–Mo layer. The γ-U-Mo and the Al layers retain their crystallinity. Furthermore, with increasing irradiation temperature, the Al proportion in the interdiffusion layer rises, indicating an enhanced Al atomic flow with increasing irradiation temperature. |
| Databáze: | OpenAIRE |
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