Ion beam irradiation of lanthanum compounds in the series La2O3-TiO2

dc.contributor.authorWhittle, KRen_AU
dc.contributor.authorBlackford, MGen_AU
dc.contributor.authorAughterson, RDen_AU
dc.contributor.authorSmith, KLen_AU
dc.contributor.authorLumpkin, GRen_AU
dc.contributor.authorZaluzec, NKen_AU
dc.description.abstractThin crystals of La2O3, La2/3TiO3, La2TiO5, and La2Ti2O7 have been irradiated in situ using 1 MeV Kr2+ ions in the Intermediate Voltage Electron Microscope-Tandem User Facility (IVEM-Tandem), at the Argonne National Laboratory (ANL). We observed that La2O3 remained crystalline to a fluence greater than 3.1 × 1016 ions cm-2 at a temperature of 50 K. The four binary oxide compounds in the two systems were observed through the crystalline-amorphous transition as a function of ion fluence and temperature. Results from the ion irradiations give critical temperatures for amorphisation (Tc) of 840 K for La2Ti2O7, 865 K for La2/3TiO3, and 1027 K for La2TiO5. The Tc values observed in this study, together with previous data for TiO2, are discussed with reference to the phase diagrams for La2O3-TiO2 systems and the different local environments within the crystal structures. Results suggest an observable inverse correlation between Tc and melting temperature (Tm) in the two systems.en_AU
dc.description.sponsorshipAustralian Nuclear Science and Technology Organisation (ANSTO); Los Alamos National Laboratory; CEA Nuclear Energy Division; Materials Research Society (MRS)en_AU
dc.identifier.booktitleMRS Online Proceedings Library : Symposium AA — Scientific Basis for Nuclear Waste Management XXXIVen_AU
dc.identifier.citationWhittle, K. R., Blackford, M. G., Aughterson, R. D., Smith, K. L., Lumpkin, G. R., & Zaluzec, N. K. (2010). Ion beam irradiation of lanthanum compounds in the series La2O3-TiO2. Paper presented to the 34th International Symposium on the Scientific Basis for Nuclear Waste Management (2010 MRS Spring Meeting), 5th - 9th April 2010. San Francisco, California: Moscone West and San Francisco Marriott. In K. L. Smith, S. Kroeker, B. Uberuaga, K. R. Whittle (Eds.), Scientific Basis for Nuclear Waste Management XXXIV, 1265 157-162. doi:10.1557/PROC-1265-AA08-05-BB07-05en_AU
dc.identifier.conferenceenddate9 April 2010en_AU
dc.identifier.conferencename34th International Symposium on the Scientific Basis for Nuclear Waste Management (2010 MRS Spring Meeting)en_AU
dc.identifier.conferenceplaceSan Francisco, Californiaen_AU
dc.identifier.conferencestartdate5 April 2010en_AU
dc.identifier.editorsK. L. Smith, S. Kroeker,B. Uberuaga, & K. R. Whittleen_AU
dc.publisherMaterials Research Societyen_AU
dc.subjectIon beamsen_AU
dc.subjectCrystal structureen_AU
dc.subjectElectron microscopesen_AU
dc.titleIon beam irradiation of lanthanum compounds in the series La2O3-TiO2en_AU
dc.typeConference Presentationen_AU
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