Radiation effects in Zr and Hf containing garnets
| Autor: | Karl R. Whittle, Nestor J. Zaluzec, Mark G. Blackford, Matthew Weyland, Katherine L. Smith, Gregory R. Lumpkin |
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| Rok vydání: | 2015 |
| Předmět: |
010302 applied physics
Nuclear and High Energy Physics Materials science Analytical chemistry Mineralogy 02 engineering and technology Radiation 021001 nanoscience & nanotechnology 01 natural sciences Charged particle Ion chemistry.chemical_compound Hydrofluoric acid chemistry Materials Science(all) Nuclear Energy and Engineering Transmission electron microscopy Silicate minerals 0103 physical sciences Radiation damage General Materials Science Irradiation 0210 nano-technology |
| Zdroj: | JOURNAL OF NUCLEAR MATERIALS |
| ISSN: | 0022-3115 |
| DOI: | 10.1016/j.jnucmat.2015.02.007 |
| Popis: | Garnets have been considered as host phases for the safe immobilisation of high-level nuclear waste, as they have been shown to accommodate a wide range of elements across three different cation sites, such as Ca, Y, Mn on the a-site, Fe, Al, U, Zr, and Ti on the b-site, and Si, Fe, Al on the c-site. Garnets, due to their ability to have variable composition, make ideal model materials for the examination of radiation damage and recovery in nuclear materials, including as potential waste forms. Kimzeyite, Ca 3 Zr 2 FeAlSiO 12 , has been shown naturally to contain up to 30 wt% Zr, and has previously been examined to elucidate both the structure and ordering within the lattice. This study examines the effects of radiation damage and recovery using in-situ ion beam irradiation with 1 MeV Kr ions at the IVEM-TANDEM facility, Argonne National Laboratory. The complementary Hf containing system Ca 3 Hf 2 FeAlSiO 12 was also examined, and found to have a different response to irradiation damage. A sample of irradiated Ca 3 Zr 2 FeAlSiO 12 , at 1000 K, was characterised using aberration corrected (S)TEM and found to contain discreet, nano-sized, crystalline Fe rich particles, indicating a competing process during recovery is occurring. |
| Databáze: | OpenAIRE |
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