In situ XAFS-XRD study of the Zr-Y₂O₃ interaction at extra-high temperatures.

ABSTRACT: The in situ measurement technique for a metal/metal-oxide mixture at extra-high temperature above 2000 K has been desired in the field of nuclear safety engineering. In the present study, we succeeded in simultaneous XAFS-XRD measurements of the Zr oxidation [Zr + O → Zr(O) + ZrO₂] up to 1952 K and ZrO₂-Y₂O₃ reaction from 1952 to 2519 K. The chemical shift during Zr oxidation was observed in the absorption spectra around the Zr K-edge, and the interatomic cation-cation and cation-oxygen distances obtained by the fitting analysis of EXAFS during the Y₂O₃-ZrO₂ reaction are explained. Also, the temperature dependency of the anharmonic effect was investigated by comparing the fitted second- and third-order cumulants w

SUBMITTER: Itoh A 

PROVIDER: S-EPMC11226155 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature