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dc.contributor.authorYazdani, Bahareh
dc.contributor.authorXu, Fang
dc.contributor.authorAhmad, Iftikhar
dc.contributor.authorHou, Xianghui
dc.contributor.authorXia, Yongde
dc.contributor.authorZhu, Yanqiu
dc.date.accessioned2015-06-26T13:53:53Z
dc.date.issued2015
dc.description.abstractTribological performance of the hot-pressed pure Al2O3 and its composites containing various hybrid contents of graphene nanoplatelets (GNPs) and carbon nanotubes (CNTs) were investigated under different loading conditions using the ball-on-disc method. Benchmarked against the pure Al2O3, the composite reinforced with a 0.5 wt% GNP exhibited a 23% reduction in the friction coefficient along with a promising 70% wear rate reduction, and a hybrid reinforcement consisting of 0.3 wt.% GNPs + 1 wt.% CNTs resulted in even better performance, with a 86% reduction in the wear rate. The extent of damage to the reinforcement phases caused during wear was studied using Raman spectroscopy. The wear mechanisms for the composites were analysed based on the mechanical properties, brittleness index and microstructural characterizations. The excellent coordination between GNPs and CNTs contributed to the excellent wear resistance property in the hybrid GNT-reinforced composites. GNPs played the important role in the formation of a tribofilm on the worn surface by exfoliation; whereas CNTs contributed to the improvement in fracture toughness and prevented the grains from being pulled out during the tribological test.en_GB
dc.description.sponsorshipUniversity of Exeteren_GB
dc.description.sponsorshipResearch Centre of College of Engineering and Deanship of Scientific Research (King Saud University, Riyadh)en_GB
dc.description.sponsorshipEngineering and Physical Sciences Research Council (EPSRC)en_GB
dc.identifier.citationVol. 5, article 11579en_GB
dc.identifier.doi10.1038/srep11579
dc.identifier.urihttp://hdl.handle.net/10871/17677
dc.language.isoenen_GB
dc.publisherNature Publishing Groupen_GB
dc.relation.urlhttp://dx.doi.org/10.1038/srep11579en_GB
dc.rightsThis work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/en_GB
dc.subjectMechanical engineeringen_GB
dc.subjectCeramicsen_GB
dc.subjectCompositesen_GB
dc.subjectStructural propertiesen_GB
dc.titleTribological performance of Graphene/Carbon nanotube hybrid reinforced Al2O3 compositesen_GB
dc.typeArticleen_GB
dc.date.available2015-06-26T13:53:53Z
dc.identifier.issn2045-2322
exeter.article-number5:11579
dc.descriptionOpen Access journalen_GB
dc.identifier.journalScientific Reportsen_GB


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