Nanoscale chemistry of Zircaloy-2 exposed to three and nine annual cycles of boiling water reactor operation — an atom probe tomography study
نویسندگان
چکیده
• Zircaloy-2 exposed in BWR was analysed with APT before and after breakaway. Fe–Cr clusters Sn were analysed. Layers of anticorrelated layers higher concentration. The clustering similar breakaway, a small increase size. observations might be used to better understand Atom probe tomography this work study the metal close metal/oxide interface zirconium alloy three nine annual cycles operation commercial boiling water reactor. two exposure times correspond onset acceleration corrosion, hydrogen pickup, growth. alloying elements Sn, Fe, Cr, Ni observed redistributed exposure. After both cycles, containing Fe Cr typically spheroidal shape an approximate diameter 5 nm located presumed < >-loops. On average, cluster number density slightly larger more Cr-rich clusters. However, there large grain-to-grain variations, which than differences between times. only occasionally enriched clusters, but concentration inside detected regions that depleted Cr. Enrichment at features appeared c >-component loops whereas no such cycles. amounts Ni, grain boundaries partially dissolved second phase particle Zr(Fe,Cr) 2 type contained about ten observed.
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ژورنال
عنوان ژورنال: Journal of Nuclear Materials
سال: 2022
ISSN: ['1873-4820', '0022-3115']
DOI: https://doi.org/10.1016/j.jnucmat.2022.153537