Atom Probe Tomography Investigation of Clustering in Model P2O5-Doped Borosilicate Glasses for Nuclear Waste Vitrification.

Autor:	Klupś P; Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, UK., Skerratt-Love K; Materials and Engineering Research Institute, Sheffield Hallam University, Sheffield S1 1WB, UK., Kruger AA; Office of River Protection 2440 Stevens Center PI, Richland, WA 99354, USA., George J; Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA., Bell AMT; Materials and Engineering Research Institute, Sheffield Hallam University, Sheffield S1 1WB, UK., Bingham PA; Materials and Engineering Research Institute, Sheffield Hallam University, Sheffield S1 1WB, UK., Moody MP; Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, UK., Bagot PAJ; Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, UK.
Jazyk:	angličtina
Zdroj:	Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada [Microsc Microanal] 2024 Jul 08. Date of Electronic Publication: 2024 Jul 08.
DOI:	10.1093/mam/ozae059
Abstrakt:	Atom probe tomography (APT) has been utilized to investigate the microstructure of two model borosilicate glasses designed to understand the solubility limits of phosphorous pentoxide (P2O5). This component is found in certain high-level radioactive defence wastes destined for vitrification, where phase separation can potentially lead to a number of issues relating to the processing of the glass and its long-term chemical and structural stability. The development of suitable focused ion beam (FIB)-preparation routes and APT analysis conditions were initially determined for the model glasses, before examining their detailed microstructures. In a 3.0 mol% P2O5-doped glass, both visual inspection and sensitive statistical analysis of the APT data show homogeneous microstructures, while raising the content to 4.0 mol% initiates the formation of phosphorus-enriched nanoscale precipitates. This study confirms the expected inhomogeneities and phase separation of these glasses and offers routes to characterizing these at near-atomic scale resolution using APT. Competing Interests: Conflict of Interest The authors declare that they have no competing interest. (© The Author(s) 2024. Published by Oxford University Press on behalf of the Microscopy Society of America.)
Databáze:	MEDLINE
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