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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
EDS profile of a cross-section through an oxide layer grown on an Zy-4 sample after different lengths of exposure to the LiOH solution: (a) 504 h, (b) 1512 h, (c) 3024 h.