Nano- and micro-scale impact testing of zirconia, alumina and zirconia-alumina duplex optical coatings on glass

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dc.contributor.authorBeake, Ben D.
dc.contributor.authorIsern, Luis
dc.contributor.authorBhattacharyya, Debabrata
dc.contributor.authorEndrino, José L.
dc.contributor.authorLawson, Ken
dc.contributor.authorWalker, Trevor
dc.date.accessioned2020-10-19T12:07:55Z
dc.date.available2020-10-19T12:07:55Z
dc.date.issued2020-10-06
dc.description.abstractOptimising the mechanical properties of optical coatings to improve their durability will be critical if they are to be used successfully in harsh environments where they may be subject to degradation by mechanical contact. In this study zirconia, zirconia-alumina duplex and alumina experimental coatings were deposited on soda lime and borosilicate glass and their resistance to repetitive impact under different experimental conditions evaluated in nano- and micro-scale impact tests. The influence of changing probe geometry (sharp and blunt contacts) and applied load on the deformation was studied. Spheroconical indenters were found to be more suitable to study the load sensitivity of the impact response than sharp cube corner indenters. Increased resistance to plastic deformation in the coating-substrate system (H3/E2) proved detrimental to the damage tolerance to the repetitive nano- and micro-impact tests. To compare the deformation behaviour in nano-impact and nano-scratch, tests were performed using the same spheroconical probe, revealing cracking and blistering of the glass substrate in both types of test. The change in probe depth after the first impact was found to be a very useful metric to effectively compare the evolution of surface damage on continued impact in nano- and micro-impact tests at different applied load and probe geometryen_UK
dc.identifier.citationBeake BD, Isern L, Bhattacharyya D, et al., (2020) Nano- and micro-scale impact testing of zirconia, alumina and zirconia-alumina duplex optical coatings on glass. Wear, Volumes 462-463, December 2020, Article number 203499en_UK
dc.identifier.issn0043-1648
dc.identifier.urihttps://doi.org/10.1016/j.wear.2020.203499
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/15898
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectOptical Wear testingen_UK
dc.subjectImpact wearen_UK
dc.subjectFracture behaviouren_UK
dc.subjectPVD coatingsen_UK
dc.subjectSurface analysisen_UK
dc.titleNano- and micro-scale impact testing of zirconia, alumina and zirconia-alumina duplex optical coatings on glassen_UK
dc.typeArticleen_UK

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