Preliminary Structural Study of Chromium Coatings for Nuclear Applications
Abstract
Following the Fukushima Daiichi disaster, an increasing number of studies concentrate on the development of Accident Tolerant Fuel (ATF) cladding materials for nuclear fuel, aiming to prevent the oxidation of zirconium during incidents such as Loss of Coolant Accident (LOCA) and to effectively lower the amount of heat and hydrogen released during emergency core cooling (ECC). Zirconium alloy cladding with a protective chromium (Cr) coating is considered one of the promising candidates, largely due to its relatively short timeline for deployment in nuclear power plants. In this study, Cr-coated and uncoated Zircaloy-4 claddings were evaluated using high temperature X-ray diffraction (HT-XRD) in vacuum over a temperature range from RT to 1100oC. The temperatures corresponding to the formation of oxide phases are >200oC and >600oC for the uncoated and Cr-coated samples, respectively. SEM and TEM characterisation of the sub-surface in Cr-coated specimen after HT-XRD revealed Fe segregation, formation of Zr(Fe,Cr)2 Laves phase and nano-bubbles at the former Cr / Z4 interface.
Keywords
Cite
@article{arxiv.2605.02531,
title = {Preliminary Structural Study of Chromium Coatings for Nuclear Applications},
author = {Michał A. Stróżyk and Jong-Dae Hong and JaeYong Kim and Iwona Jóźwik and Ryszard Diduszko and Jerzy Zagórski and Witold Chromiński and Kinga Suchorab and Katarzyna Ciporska and Marcin Brykała and Jacek Jagielski},
journal= {arXiv preprint arXiv:2605.02531},
year = {2026}
}
Comments
20 pages, 8 figures