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dc.contributor.authorLu, Chunsheng
dc.contributor.authorMai, Y.
dc.contributor.authorShen, Y.
dc.contributor.editorY. L. Bai, Q. S. Zheng, and Y. G. Wei
dc.date.accessioned2017-01-30T14:50:57Z
dc.date.available2017-01-30T14:50:57Z
dc.date.created2015-09-29T01:51:42Z
dc.date.issued2007
dc.identifier.citationLu, C. and Mai, Y. and Shen, Y. 2007. The origin of superhardness of nanocomposite coatings: analysis of nanoindentation and scratch tests, in Y. L. Bai, Q. S. Zheng, and Y. G. Wei (ed), IUTAM Symposium on Mechanical Behaviour and Micro-Mechanics of Nanostructured Materials, Jun 27 2005, pp. 39-49. Beijing: Springer.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/41359
dc.description.abstract

Nanocomposite coatings characterized by superhardness exhibit unique microstructures and deformation mechanisms at the nanometre scale. Based on the studies of nano-indentation size effect, we show that dislocation-based deformation is gradually replaced by grain-boundary mediated deformation as the hardness of coatings increases, especially for coatings approaching superhardness. The measured hardness of a superhard coating exponentially increases with the decrease of indentation depth, and its intrinsic hardness can be exactly determined by the analysis of indentation size effect. The optimal conditions extracted from acoustic emission signals from scratching superhard nanocomposite coatings are in good agreement with nanoindentation and drilling tests. In the optimal regime, it is the competition between different deformation mechanisms that results in the origin of superhardness in self-organized microstructures of nanocomposite coatings.

dc.publisherSpringer
dc.relation.urihttp://www.springer.com/east/home/engineering?SGWID=5-175-22-173701716-detailsPage=ppmmedia%7Ctoc
dc.subjectsize effect
dc.subjectacoustic emission
dc.subjectnanoindentation
dc.subjectsuperhard coatings
dc.titleThe origin of superhardness of nanocomposite coatings: analysis of nanoindentation and scratch tests
dc.typeConference Paper
dcterms.source.startPage39
dcterms.source.endPage49
dcterms.source.titleIUTAM Symposium on Mechanical Behaviour and Micro-Mechanics of Nanostructured Materials
dcterms.source.seriesIUTAM Symposium on Mechanical Behaviour and Micro-Mechanics of Nanostructured Materials
dcterms.source.isbn1402056230
dcterms.source.conferenceIUTAM Symposium on Mechanical Behaviour and Micro-Mechanics of Nanostructured Materials
dcterms.source.conference-start-dateJun 27 2005
dcterms.source.conferencelocationBeijing
dcterms.source.placeThe Netherlands
curtin.accessStatusFulltext not available


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