The Influence of Grain Size on Microstructure Evolution in CeO under Xenon Ion Irradiation.

Large-grained UO is considered a potential accident-tolerant fuel (ATF) due to its superior fission gas retention capabilities. Irradiation experiments for cerium dioxide (CeO), used as a surrogate fuel, is a common approach for evaluating the performance of UO. In this work, spark plasma sintered CeO pellets with varying grain sizes (145 nm, 353 nm, and 101 μm) and a relative density greater than 93.

Unveiling the mechanism of tuning elemental distribution in high entropy alloys and its effect on thermal stability.

The issue of elemental distribution such as chemical short range order (SRO) in high entropy alloys (HEAs) has garnered increased attention in both experimental and theoretical realms. A comprehensive and urgently required elucidation of this atomic-level phenomenon is the focus of this study. In this work, we systematically analyzed atomic-level information, involving atomic volume, charge transfer, local chemical ordering and atomic stress in 3d HEAs.