Photo-Assisted Reduction in Nanostructured Cerium-Based Coatings
Nanostructured cerium-based coatings on AZ31 Mg alloy substrates exposed to sunlight under ambient conditions had an ~30% increase in Ce(III) species compared to unexposed coatings as measured by X-ray photoelectron spectroscopy. A decrease in film cracks and shift in bandgap from 2.5 eV to 2.7 eV were also measured. Visible changes in color, from yellow to translucent, with exposure were also observed and suggest that cerium-based coatings are reduced by light exposure in humid environments.
C. E. Castano et al., "Photo-Assisted Reduction in Nanostructured Cerium-Based Coatings," Scripta Materialia, vol. 69, no. 6, pp. 489-492, Elsevier Limited, Sep 2013.
The definitive version is available at http://dx.doi.org/10.1016/j.scriptamat.2013.06.010
Materials Science and Engineering
Keywords and Phrases
Cerium oxides; Magnesium alloys; Nanostructured materials; Photochemical reaction; Ambient conditions; AZ31 Mg alloys; Cerium oxides; Film cracks; Humid environment; Light exposure; Nano-structured; Photo-assisted
International Standard Serial Number (ISSN)
Article - Journal
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