Insights into the uranium-H2O corrosion mechanism from the atomic-scale coexistence relationship between UH3 and UO2
Source abstract
Abstract
This study investigates the corrosion products formed on the surface of metallic uranium (U) during H 2O corrosion in an open to air system. The results unambiguously reveal the presence of UH 3 nanoparticles dispersed in the non-adherent corrosion layers, albeit in small quantities. High-resolution transmission electron microscopy provides an atomic-scale depiction of the coexistent structure of UH 3 and UO 2, which is described by an innovative “Core (UH 3) – Shell (UO 2)” model within the corrosion layers. The direct observation of UH 3 in this form provides evidence supporting the U-H 2 O corrosion mechanism postulated to be catalyzed by the interfacial hydrides.
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Research context
OpenAlex topics: Nuclear Materials and Properties · Radioactive element chemistry and processing · Advanced Materials Characterization Techniques
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References (41)
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