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Radiation effects in Zr and Hf containing garnets.
- Source :
-
Journal of Nuclear Materials . Jul2015, Vol. 462, p508-513. 6p. - Publication Year :
- 2015
-
Abstract
- 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. [ABSTRACT FROM AUTHOR]
- Subjects :
- *RADIATION damage
*ZIRCONIUM
*HAFNIUM
*GARNET
*RADIOACTIVE wastes
Subjects
Details
- Language :
- English
- ISSN :
- 00223115
- Volume :
- 462
- Database :
- Academic Search Index
- Journal :
- Journal of Nuclear Materials
- Publication Type :
- Academic Journal
- Accession number :
- 103236466
- Full Text :
- https://doi.org/10.1016/j.jnucmat.2015.02.007