Atomic scale analysis of grain boundary deuteride growth front in Zircaloy-4

2018/06/27 by Andrew Breen, Breen, A. J., Isabelle Mouton +25
Engineering · Materials Science · #Advanced Materials Characterization Techniques #FOS: Physical sciences #High Temperature Alloys and Creep #Materials Science (cond-mat.mtrl-sci) #Nuclear Materials and Properties

paper · pdf · doi:10.48550/arxiv.1806.10286

openalex publication_date 2018/06/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Zircaloy-4 (Zr-1.5%Sn-0.2%Fe-0.1%Cr wt. %) was electrochemically charged with deuterium to create deuterides and subsequently analysed with atom probe tomography and scanning transmission electron microscopy to understand zirconium hydride formation and embrittlement. At the interface between the hexagonal close packed (HCP) α-Zr matrix and a face centred cubic (FCC) δdeuteride (ZrD1.5-1.65), a HCP ζphase deuteride (ZrD0.25-0.5) has been observed. Furthermore, Sn is rejected from the deuterides and segregates to the deuteride/α-Zr reaction front.

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