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Characterisation of Carbide Particles in S-65 Beryllium by Scanning Kelvin Probe Force Microscopy

Mallinson, Christopher, Harvey, A and Watts, John (2017) Characterisation of Carbide Particles in S-65 Beryllium by Scanning Kelvin Probe Force Microscopy Journal of The Electrochemical Society, 164 (7). C342-C348.

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Abstract

Scanning Kelvin probe force microscopy has been employed to examine the behaviour of second phase carbide particles in beryllium at different relative humidity levels and after exposure to deionised water. Carbides are believed to have a role in the localised corrosion of beryllium as a result of their hydrolysis when exposed at the metal surface. The presence of beryllium carbide was confirmed by means of Auger electron spectroscopy and the particles were further characterised by scanning electron microscopy, energy/wavelength dispersive x-ray spectroscopy and scanning Kelvin probe force microscopy. The particles were found to have a more noble Volta potential than the beryllium matrix and a decrease in the Volta potential difference between the second phase particles and the matrix was observed as the humidity was increased. A thick beryllium oxide/hydroxide layer then formed on the particles following exposure to water significantly reducing their potential.

Item Type: Article
Subjects : Mechanical Engineering Science
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
NameEmailORCID
Mallinson, Christopherc.mallinson@surrey.ac.ukUNSPECIFIED
Harvey, AUNSPECIFIEDUNSPECIFIED
Watts, JohnJ.Watts@surrey.ac.ukUNSPECIFIED
Date : 17 May 2017
Identification Number : 10.1149/2.0271707jes
Copyright Disclaimer : Copyright 2017 Electrochemical Society
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 09 May 2017 18:01
Last Modified : 20 Sep 2017 15:40
URI: http://epubs.surrey.ac.uk/id/eprint/814146

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