dc.contributor.author | Yazdani, Bahareh | |
dc.contributor.author | Xu, Fang | |
dc.contributor.author | Ahmad, Iftikhar | |
dc.contributor.author | Hou, Xianghui | |
dc.contributor.author | Xia, Yongde | |
dc.contributor.author | Zhu, Yanqiu | |
dc.date.accessioned | 2015-06-26T13:53:53Z | |
dc.date.issued | 2015 | |
dc.description.abstract | Tribological 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.sponsorship | University of Exeter | en_GB |
dc.description.sponsorship | Research Centre of College of Engineering and Deanship of Scientific Research (King Saud University, Riyadh) | en_GB |
dc.description.sponsorship | Engineering and Physical Sciences Research Council (EPSRC) | en_GB |
dc.identifier.citation | Vol. 5, article 11579 | en_GB |
dc.identifier.doi | 10.1038/srep11579 | |
dc.identifier.uri | http://hdl.handle.net/10871/17677 | |
dc.language.iso | en | en_GB |
dc.publisher | Nature Publishing Group | en_GB |
dc.relation.url | http://dx.doi.org/10.1038/srep11579 | en_GB |
dc.rights | This 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.subject | Mechanical engineering | en_GB |
dc.subject | Ceramics | en_GB |
dc.subject | Composites | en_GB |
dc.subject | Structural properties | en_GB |
dc.title | Tribological performance of Graphene/Carbon nanotube hybrid reinforced Al2O3 composites | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2015-06-26T13:53:53Z | |
dc.identifier.issn | 2045-2322 | |
exeter.article-number | 5:11579 | |
dc.description | Open Access journal | en_GB |
dc.identifier.journal | Scientific Reports | en_GB |