Hot isostatic pressed pyrochlore glass‐ceramics: revealing structure insides at the reaction interface

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dc.contributor.authorZhang, YJen_AU
dc.contributor.authorWei, Ten_AU
dc.contributor.authorXu, Aen_AU
dc.contributor.authorDayal, Pen_AU
dc.contributor.authorGregg, DJen_AU
dc.date.accessioned2025-01-13T00:29:47Zen_AU
dc.date.available2025-01-13T00:29:47Zen_AU
dc.date.issued2021-06-15en_AU
dc.date.statistics2024-10-22en_AU
dc.description.abstractAs potential waste forms for immobilizing actinide‐rich radioactive wastes, Eu2Ti2O7 (Eu as a surrogate for minor actinides) pyrochlore glass‐ceramics were fabricated via hot isostatic pressing (HIPing) at 1200°C. The structure and microstructure at the reaction interface between the glass‐ceramic waste form and the stainless steel (SS) canister under HIPing conditions were carefully investigated with scanning electron microscopy (SEM), transmission electron microscopy (TEM), and synchrotron single crystal X‐ray diffraction (SC‐XRD). The interactions at the reaction interface led to the formations of a ~10‐µm‐thick Cr2O3 layer as the oxidation front of the SS and a layer of a mixed oxide phase (Eu1.25SiCr0.8Ti1.2O7.5) on the glass‐ceramic side of the reaction interface. The crystal structure of such a unique mixed oxide phase was revealed indubitably with a combination of synchrotron SC‐XRD and TEM assisted with a focused ion beam (FIB) SEM system. The improved structural understanding of the reaction interface will help to support the utilization of HIPing as a versatile hot consolidation process for the treatment of radioactive wastes. © 2024 The American Ceramic Society/en_AU
dc.identifier.citationZhang, Y., Wei, T., Xu, A., Dayal, P., & Gregg, D. J. (2021). Hot isostatic pressed pyrochlore glass-ceramics: revealing structure insides at the reaction interface. Journal of the American Ceramic Society, 104(11), 5981-5989. doi:10.1111/jace.17958en_AU
dc.identifier.issn0002-7820en_AU
dc.identifier.issn1551-2916en_AU
dc.identifier.issue11en_AU
dc.identifier.journaltitleJournal of the American Ceramic Societyen_AU
dc.identifier.pagination5981-5989en_AU
dc.identifier.urihttps://doi.org/10.1111/jace.17958en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15922en_AU
dc.identifier.volume104en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherWileyen_AU
dc.subjectPyrochloreen_AU
dc.subjectCeramicsen_AU
dc.subjectActinidesen_AU
dc.subjectRadioactive wastesen_AU
dc.subjectMicrostructureen_AU
dc.subjectMicroscopyen_AU
dc.subjectEuropiumen_AU
dc.subjectSiliconen_AU
dc.subjectChromiumen_AU
dc.subjectCrystal structureen_AU
dc.subjectOxidesen_AU
dc.subjectSynroc processen_AU
dc.subjectGlassen_AU
dc.subjectTransmission electron microscopyen_AU
dc.titleHot isostatic pressed pyrochlore glass‐ceramics: revealing structure insides at the reaction interfaceen_AU
dc.typeJournal Articleen_AU
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