Please use this identifier to cite or link to this item: https://apo.ansto.gov.au/dspace/handle/10238/9248
Title: The influence of crystal structure on ion-irradiation tolerance in the Sm(x)Yb(2-x)TiO5 series
Authors: Aughterson, RD
Lumpkin, GR
de los Reyes, M
Gault, B
Baldo, P
Ryan, EA
Whittle, KR
Smith, KL
Cairney, JM
Keywords: Irradiation
Crystal structure
Stoichiometry
Amorphous state
Orthorhombic lattices
Electron microscopy
Issue Date: 1-Apr-2016
Publisher: Elsevier B.V.
Citation: Aughterson, R. D., Lumpkin, G. R., de Los Reyes, M., Gault, B., Baldo, P., Ryan, E., Srittle, K. R., Smith, K, L., & Cairney, J. M. (2016). The influence of crystal structure on ion-irradiation tolerance in the Sm(x)Yb(2-x)TiO 5 series. Journal of Nuclear Materials, 471, 17-24. doi:10.1016/j.jnucmat.2015.12.036
Abstract: This ion-irradiation study covers the four major crystal structure types in the Ln2TiO5 series (Ln = lanthanide), namely orthorhombic Pnma, hexagonal P63/mmc, cubic (pyrochlore-like) Fd-3m and cubic (fluorite-like) Fm-3m. This is the first systematic examination of the complete Ln2TiO5 crystal system and the first reported examination of the hexagonal structure. A series of samples, based on the stoichiometry Sm(x)Yb(2-x)TiO5 (where x = 2, 1.4, 1, 0.6, and 0) have been irradiated using 1 MeV Kr2+ ions and characterised in-situ using a transmission electron microscope. Two quantities are used to define ion-irradiation tolerance: critical dose of amorphisation (Dc), which is the irradiating ion dose required for a crystalline to amorphous transition, and the critical temperature (Tc), above which the sample cannot be rendered amorphous by ion irradiation. The structure type plus elements of bonding are correlated to ion-irradiation tolerance. The cubic phases, Yb2TiO5 and Sm0.6Yb1.4TiO5, were found to be the most radiation tolerant, with Tc values of 479 and 697 K respectively. The improved radiation tolerance with a change in symmetry to cubic is consistent with previous studies of similar compounds. © 2016 Elsevier B.V.
Gov't Doc #: 8992
URI: https://doi.org/10.1016/j.jnucmat.2015.12.036
http://apo.ansto.gov.au/dspace/handle/10238/9248
ISSN: 0022-3115
Appears in Collections:Journal Articles

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