Fabrication of bulk delta-phase Zirconium Hydride from Zircaloy-4 for use as moderators in microreactors
arXiv:2305.02249 · doi:10.1016/j.scriptamat.2023.115771
Abstract
The fabrication of bulk delta-phase Zirconium Hydride (-ZrH) using Zircaloy-4 as a precursor is herein reported. Characterization using electron-microscopy methods indicate that the fabricated material is of a single-phase. Sn-rich segregation zones have been observed to form as a direct result of the hydriding process. These findings experimentally validate previous \textit{ab initio} calculations on the influence H incorporation in Zircaloy-4 constitutional elements such as Sn, Fe and Cr. The effect of hydriding and Sn segregation on pre-existing Zr(Fe,Cr) Laves phases is also evaluated. Major implications on the development of moderators for use in microreactors within the nuclear industry are discussed.