| Porwal, Harshit, Tatarko, Peter, Saggar, Richa, Grasso, Salvatore, Mani, Mahesh Kumar, Dlouhý, Ivo, Dusza, Jan and Reece, Mike J. 2014. Tribological properties of silica-graphene nano-platelet composites. Ceramics International 40 (8) , pp. 12067-12074. 10.1016/j.ceramint.2014.04.046 |
Abstract
Graphene nano-platelets (GNP) were synthesised using a liquid phase exfoliation method and then used to produce well dispersed silica–GNP composites. The tribological properties of the silica–GNP composites with different vol% GNP loading were investigated. The wear behaviour at room temperature was studied using a ball on disc technique with alumina and borosilicate (BS) balls as the tribological counterpart. In the case of alumina balls, GNP above a critical concentration decreased the coefficient of friction of the composite by ~20% while increasing the wear resistance of the composite by ~5.5 times. In the case of using BS balls there was an improvement of ~8.5 times in the wear resistance while the coefficient of friction did not change. In both cases a percolating network of GNP above a critical concentration provided a lubricating effect to the silica matrix, resulting in a significant improvement in the tribological properties of the nano-composites. The extent of damage to GNP during tribology testing was quantified using Raman spectroscopy.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Engineering |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| ISSN: | 0272-8842 |
| Date of Acceptance: | 7 April 2014 |
| Last Modified: | 21 Feb 2019 17:07 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/79397 |
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