Lateral deformation and defect resistance of compacted silica glass: Quantification of the scratching hardness of brittle glasses

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dc.identifier.uri http://dx.doi.org/10.15488/2622
dc.identifier.uri http://www.repo.uni-hannover.de/handle/123456789/2648
dc.contributor.author Sawamura, Shigeki
dc.contributor.author Limbach, René
dc.contributor.author Behrens, Harald
dc.contributor.author Wondraczek, Lothar
dc.date.accessioned 2018-01-19T10:57:50Z
dc.date.available 2018-01-19T10:57:50Z
dc.date.issued 2018
dc.identifier.citation Sawamura, S.; Limbach, R.; Behrens, H.; Wondraczek, L.: Lateral deformation and defect resistance of compacted silica glass: Quantification of the scratching hardness of brittle glasses. In: Journal of Non-Crystalline Solids 481 (2018), S. 503-511. DOI: https://doi.org/10.1016/j.jnoncrysol.2017.11.035
dc.description.abstract Human interaction with multimedia devices occurs predominantly over inorganic glass surfaces. Scratch-induced damage is a primary limitation in the suitability of brittle glasses for this purpose. However, neither truly quantitative data nor a topo-chemical understanding of the underlying deformation process which would allow for the development of improved materials is presently available. Here, we present lateral nano-indentation experiments for determining the work of deformation which is involved in the process of glass scratching. Using a series of hot-compressed vitreous silica with mild degrees of structural densification, we derive relations between quantitative scratch hardness and the underlying glass structure. We show that Young's modulus provides a clear rational for the observed variations in scratching hardness. In the specific case of silica, the energy needed to generate a certain scratch volume corresponds to roughly one tenth of Young's modulus. This relationship formally indicates that only about one tenth of the bonds which are involved in the deformation process are broken in its course. However, comparison with a more complex glass material with a certain fraction of two dimensional structural units and a strong ability for topological adaption to local stress clearly indicates a deviation from this behavior. This opens a pathway to topo-chemical engineering of scratch-resistant glasses. eng
dc.language.iso eng
dc.publisher Amsterdam : Elsevier
dc.relation.ispartofseries Journal of Non-Crystalline Solids 481 (2018)
dc.rights CC BY 4.0 Unported
dc.rights.uri https://creativecommons.org/licenses/by/4.0/
dc.subject Glass eng
dc.subject Scratch hardness eng
dc.subject Scratch resistance eng
dc.subject Silica eng
dc.subject Deformation eng
dc.subject Elastic moduli eng
dc.subject Fused silica eng
dc.subject Hardness eng
dc.subject Silica eng
dc.subject Deformation process eng
dc.subject Human interactions eng
dc.subject Lateral deformation eng
dc.subject Multimedia device eng
dc.subject Quantitative data eng
dc.subject Scratch hardness eng
dc.subject Scratch resistance eng
dc.subject Work of deformation eng
dc.subject Glass eng
dc.subject.ddc 620 | Ingenieurwissenschaften und Maschinenbau ger
dc.title Lateral deformation and defect resistance of compacted silica glass: Quantification of the scratching hardness of brittle glasses
dc.type article
dc.type Text
dc.relation.issn 00223093
dc.relation.doi https://doi.org/10.1016/j.jnoncrysol.2017.11.035
dc.bibliographicCitation.volume 481
dc.bibliographicCitation.firstPage 503
dc.bibliographicCitation.lastPage 511
dc.description.version publishedVersion
tib.accessRights frei zug�nglich


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