The ion-irradiation tolerance of the pyrochlore to fluorite Ho(x)Yb(2-x)TiO5 and Er2TiO5 compounds: a TEM comparative study using both in-situ and bulk ex-situ irradiation approaches

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dc.contributor.authorAughterson, RDen_AU
dc.contributor.authorLumpkin, GRen_AU
dc.contributor.authorSmith, KLen_AU
dc.contributor.authorde los Reyes, Men_AU
dc.contributor.authorDavis, Jen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorRidgway, MCen_AU
dc.contributor.authorCairney, JMen_AU
dc.date.accessioned2021-06-29T01:20:23Zen_AU
dc.date.available2021-06-29T01:20:23Zen_AU
dc.date.issued2018-08-15en_AU
dc.date.statistics2021-06-24en_AU
dc.description.abstractWe refine the crystal structures of a systematic series of compounds with the general composition Ho(x)Yb(2-x)TiO5 (x = 2, 1.6, 1.2, 1, 0.8, 0.4, 0) and Er2TiO5 and find a transition from defect-pyrochlore to defect-fluorite structure with increasing ytterbium content, decreasing lanthanide radius. Short-range structure modulations consisting of pyrochlore-like nano-domains are systematically characterised using transmission electron microscopy. We test the Kr2+ 1 MeV ion-irradiation response of Ho2TiO5, HoYbTiO5, Yb2TiO5, and Er2TiO5, via the crystalline to amorphous transition observed by using the in-situ TEM approach. The critical dose of amorphisation, Dc, was measured at various temperatures and used to calculate the critical temperature for maintaining crystallinity, Tc. A trend of lower Tc values with decreasing lanthanide radius is found. We describe a new approach for determining Tc values using cross-sectional TEM analysis of ex-situ bulk irradiated, 1 MeV Se+, samples; Ho2TiO5, HoYbTiO5 and Yb2TiO5. The results of Dc and Tc values using the two approaches vary; however the trends across the sample system remain the same. © 2018 Published by Elsevier B.V.en_AU
dc.identifier.citationAughterson, R. D., Lumpkin, G. R., Smith, K. L., de los Reyes, M., Davis, J., Avdeev, M., Ridgway, M. C., & Cairney, J. M. (2018). The ion-irradiation tolerance of the pyrochlore to fluorite Ho(x)Yb(2-x)TiO5 and Er2TiO5 compounds: a TEM comparative study using both in-situ and bulk ex-situ irradiation approaches. Journal of Nuclear Materials, 507, 316-326, doi:10.1016/j.jnucmat.2018.05.026en_AU
dc.identifier.issn0022-3115en_AU
dc.identifier.journaltitleJournal of Nuclear Materialsen_AU
dc.identifier.pagination316-326en_AU
dc.identifier.urihttps://doi.org/10.1016/j.jnucmat.2018.05.026en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10943en_AU
dc.identifier.volume507en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectTransmission electron microscopyen_AU
dc.subjectIrradiationen_AU
dc.subjectCeramicsen_AU
dc.subjectCrystallographyen_AU
dc.subjectPyrochloreen_AU
dc.subjectYtterbiumen_AU
dc.subjectRare earthsen_AU
dc.subjectCrystal structureen_AU
dc.titleThe ion-irradiation tolerance of the pyrochlore to fluorite Ho(x)Yb(2-x)TiO5 and Er2TiO5 compounds: a TEM comparative study using both in-situ and bulk ex-situ irradiation approachesen_AU
dc.typeJournal Articleen_AU
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