Graphite's resilience to high temperatures and neutron damage makes it vital for nuclear reactors,yet irradiation alters its microstructure,degrading key properties.We used small-and wide-angle X-ray scattering to...Graphite's resilience to high temperatures and neutron damage makes it vital for nuclear reactors,yet irradiation alters its microstructure,degrading key properties.We used small-and wide-angle X-ray scattering to study neutron-irradiated fine-grain nuclear graphite(Grade G347A)across varied temperatures and fluences.Results show significant shifts in internal strain and porosity,correlating with radiation-induced volume changes.Notably,porosity volume distribution(fractal dimensions)follows non-monotonic volume changes,suggesting a link to the Weibull distribution of fracture stress.展开更多
基金supported by the U.S.Department of Energy under Contracts(DE-AC02-06CH11357,DE-AC07-05ID14517,DESC0018322,IRP-22-27674).
文摘Graphite's resilience to high temperatures and neutron damage makes it vital for nuclear reactors,yet irradiation alters its microstructure,degrading key properties.We used small-and wide-angle X-ray scattering to study neutron-irradiated fine-grain nuclear graphite(Grade G347A)across varied temperatures and fluences.Results show significant shifts in internal strain and porosity,correlating with radiation-induced volume changes.Notably,porosity volume distribution(fractal dimensions)follows non-monotonic volume changes,suggesting a link to the Weibull distribution of fracture stress.
