On the oxidation mechanism of U3Si2 accident tolerant nuclear fuel
Source abstract
Abstract
The oxidation mechanism and products of U3Si2 accident tolerant nuclear fuel in flowing air up to 750 °C is reported. Differences between observed and theoretical mass gains for complete oxidation is due to un-oxidised Si that forms nano-crystalline regions of Si. Some Si rich regions are protected by the formation of UO2, which is thermodynamically preferential to oxidise before Si. The UO2 is further kinetically oxidised to form nano-crystalline U3O8. The nanostructure formed, accompanied by large volumetric expansions during oxidation produces pulverisation of fragments into powder, which may have serious consequences for fuel integrity if exposed to oxidative atmospheres.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Nuclear Materials and Properties · Nuclear materials and radiation effects · Radioactive element chemistry and processing
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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