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Corrosion Studies of LiH Thin Films

Tonks, James, King, MO, Galloway, EC and Watts, John (2016) Corrosion Studies of LiH Thin Films Journal of Nuclear Materials, 484. pp. 228-235.

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Abstract

Thin films of LiH and its corrosion products were studied using temperature programmed decomposition (TPD), x-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES). Thin films were grown on Ni(100) in an ultra high vacuum system using an electron beam evaporator. Characteristic Li KLL AES peaks were identified for Li, LiH, Li2O and LiOH which facilitated identification of thin film composition. XPS of the O 1s region revealed three distinct chemical shifts which were attributed to Li2O, LiOH and chemisorbed H2O. We show that exposing LiH to very low H2O partial pressures results in formation of LiOH/Li2O domains on LiH. We also show that these XPS peaks can be linked to reaction mechanisms in the TPD profiles. TPD traces have been explicitly modelled to determine the activation energies of the reactions and compare favourably with previous measurements on bulk LiH samples.

Item Type: Article
Subjects : Mechanical Engineering Science
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
NameEmailORCID
Tonks, Jamesj.p.tonks@surrey.ac.ukUNSPECIFIED
King, MOUNSPECIFIEDUNSPECIFIED
Galloway, ECUNSPECIFIEDUNSPECIFIED
Watts, JohnJ.Watts@surrey.ac.ukUNSPECIFIED
Date : 13 December 2016
Identification Number : 10.1016/j.jnucmat.2016.12.008
Copyright Disclaimer : © 2016 Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Depositing User : Symplectic Elements
Date Deposited : 09 Dec 2016 11:53
Last Modified : 07 Jul 2017 11:40
URI: http://epubs.surrey.ac.uk/id/eprint/813079

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