The response of complex ceramic oxides exposed to ion-irradiation, compared using two TEM characterisation techniques; bulk, ex-situ, and thin crystal, in-situ

Simple item page
dc.contributor.authorAughterson, RDen_AU
dc.contributor.authorCairney, JMen_AU
dc.contributor.authorRidgway, MCen_AU
dc.contributor.authorZaluzec, NJen_AU
dc.contributor.authorLumpkin, GRen_AU
dc.date.accessioned2022-11-03T00:06:23Zen_AU
dc.date.available2022-11-03T00:06:23Zen_AU
dc.date.issued2015-02-12en_AU
dc.date.statistics2022-10-10en_AU
dc.description.abstractThe response of materials exposed to high energy particles has been an active area of research for several decades, due both to potentially improved and detrimental effects on the material properties. For the nuclear industry ion-irradiation has been used to simulate recoil damage from alpha decay, and exposure to neutrons in fission and fusion reactors [1]. Whilst there are many changes to the host material caused via the impact of accelerated ions the particular focus of this research is on the crystalline to amorphous transition. The amorphisation of the host material can lead to detrimental effects on its properties such as swelling, embrittlement, and micro-cracking leading to eventual structural failure. The complex ceramic oxides chosen for this study, Ln2TiO5 (Ln = lanthanides and yttrium), have several uses within the nuclear industry. The compound Dy2TiO5 has been used within Russian WWER type reactors for two decades due to its good resistance to irradiation induced swelling and structural failure [2]. Of particular interest are the cubic symmetry compounds with defect fluorite structure, which gives good radiation response. Previous studies have indicated that the series ofLn2TiO5 compounds may take on a variety of crystal symmetries depending on the lanthanide size and fabrication conditions used [3, 4].Previous to any ion-irradiation exposure the materials of interest were tested for homogeneity of stoichiometry and crystallography. Characterisation was carried out via backscattered electron imaging (Z contrast) to highlight any variations in elemental composition. This was followed up with multiple spot analyses using energy dispersive x-ray spectroscopy to confirm the homogeneous nature of the material plus the stoichiometry. X-ray diffraction was used to determine the long range symmetry of the test materials plus confirm the single structure nature. Any materials found to have more than one crystal structure type or greater than 5% secondary phase were rejected for further ion-irradiation based experiments. The preliminary study of ion-irradiation response was carried out using the in-situ approach where the test materials were exposed to 1 MeV Kr2+ ions and monitored for their transition from crystalline to amorphous state. The in-situ ion-irradiation was carried out using the intermediate voltage electron microscope (IVEM)-Tandem facility at Argonne National Laboratory. The critical dose of irradiating ions, Dc, required to render the Ln2TiO5 completely amorphous was determined by monitoring selected area electron diffraction patterns for loss of diffraction spots (Bragg maxima) and replacement with diffuse rings (refer to Figure 1). Further bulk Se+ ion-irradiation was carried out at the Australian National University using the TANDEM, heavy ion accelerator. The damage penetration depth was characterised ex-situ using cross-sectional TEM. The cross-sectional damage depth profile of the bulk sample was compared with simulation, SRIM (Stopping Range of Ions in Matter), based calculations and a critical dose of amorphisation value attained. By using these two TEM characterisation approaches the thin crystal in-situ results can be compared with the more “realistic” bulk approach. ©2015 Australian Microscopy and Microanalysis Societyen_AU
dc.identifier.booktitleAMAS XIII : the 13th Biennial Australian Microbeam Analysis Symposium : program and abstractsen_AU
dc.identifier.citationAughterson, R. D., Cairney, J., Ridgway, M., Zaluzec, N. J. & Lumpkin, G. R. (2015). The response of complex ceramic oxides exposed to ion-irradiation, compared using two TEM characterisation techniques; bulk, ex-situ, and thin crystal, in-situ. Paper presented at AMAS XIII : the 13th Biennial Australian Microbeam Analysis Symposium, University of Tasmania, Hobart, 9-13 February, 2015. In Goemann, K., Danyushevsky, L. & Thompson, J. (Eds), AMAS XIII : the 13th Biennial Australian Microbeam Analysis Symposium : program and abstracts, (pp.86-87). en_AU
dc.identifier.conferenceenddate13 February 2015en_AU
dc.identifier.conferencenameAMAS XIII : the 13th Biennial Australian Microbeam Analysis Symposiumen_AU
dc.identifier.conferenceplaceHobart, Australiaen_AU
dc.identifier.conferencestartdate9 February 2015en_AU
dc.identifier.editorsGoemann, K., Danyushevsky, L. & Thompsonen_AU
dc.identifier.isbn978-09580408-5-3en_AU
dc.identifier.pagination86-87en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/13962en_AU
dc.language.isoenen_AU
dc.publisherAustralian Microscopy and Microanalysis Societyen_AU
dc.subjectCeramicsen_AU
dc.subjectIonsen_AU
dc.subjectIrradiationen_AU
dc.subjectTransmission electron microscopyen_AU
dc.subjectCrystallographyen_AU
dc.subjectMaterialsen_AU
dc.subjectRare earthsen_AU
dc.subjectX-ray spectroscopyen_AU
dc.titleThe response of complex ceramic oxides exposed to ion-irradiation, compared using two TEM characterisation techniques; bulk, ex-situ, and thin crystal, in-situen_AU
dc.typeConference Abstracten_AU
Files
Original bundle
Now showing 1 - 2 of 2
Thumbnail Image
Name:
AMASXIII_scientific_program.pdf
Size:
2.53 MB
Format:
Adobe Portable Document Format
Description:
Download
Thumbnail Image
Name:
Lumpkin.pdf
Size:
366.52 KB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Conference Publications