Alumina-graphene nanocomposite coatings fabricated by suspension high velocity oxy-fuel thermal spraying for ultra-low-wear
An alumina coating containing 1 wt.% graphene nanoplatelets (GNPs) is deposited for the first time by suspension high velocity oxy-fuel (SHVOF) thermal spraying – an emerging coating deposition technique. Raman spectroscopy shows the GNPs survive the process albeit with a two-fold increase in the de...
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| Format: | Article |
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Elsevier
2017
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| Online Access: | https://eprints.nottingham.ac.uk/48050/ |
| _version_ | 1848797679409168384 |
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| author | Murray, James W. Rance, Graham A. Xu, Fang Hussain, Tanvir |
| author_facet | Murray, James W. Rance, Graham A. Xu, Fang Hussain, Tanvir |
| author_sort | Murray, James W. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | An alumina coating containing 1 wt.% graphene nanoplatelets (GNPs) is deposited for the first time by suspension high velocity oxy-fuel (SHVOF) thermal spraying – an emerging coating deposition technique. Raman spectroscopy shows the GNPs survive the process albeit with a two-fold increase in the density of defects in the graphitic lattice. Dry-sliding wear testing at a 10 N load yields a two order of magnitude reduction in the specific wear rate for the alumina/GNP composite in comparison to the equivalent pure alumina coating. Testing with varying loads shows that the transition to the severe wear regime is prevented until between 30 and 35 N for the alumina + GNP coating which otherwise occurs between 5 and 7.5 N in the absence of GNPs. A reinforced microstructure, and specifically fracture toughness, explains the improved wear behaviour as opposed to tribofilm formation. |
| first_indexed | 2025-11-14T20:07:43Z |
| format | Article |
| id | nottingham-48050 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T20:07:43Z |
| publishDate | 2017 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-480502020-05-04T19:12:28Z https://eprints.nottingham.ac.uk/48050/ Alumina-graphene nanocomposite coatings fabricated by suspension high velocity oxy-fuel thermal spraying for ultra-low-wear Murray, James W. Rance, Graham A. Xu, Fang Hussain, Tanvir An alumina coating containing 1 wt.% graphene nanoplatelets (GNPs) is deposited for the first time by suspension high velocity oxy-fuel (SHVOF) thermal spraying – an emerging coating deposition technique. Raman spectroscopy shows the GNPs survive the process albeit with a two-fold increase in the density of defects in the graphitic lattice. Dry-sliding wear testing at a 10 N load yields a two order of magnitude reduction in the specific wear rate for the alumina/GNP composite in comparison to the equivalent pure alumina coating. Testing with varying loads shows that the transition to the severe wear regime is prevented until between 30 and 35 N for the alumina + GNP coating which otherwise occurs between 5 and 7.5 N in the absence of GNPs. A reinforced microstructure, and specifically fracture toughness, explains the improved wear behaviour as opposed to tribofilm formation. Elsevier 2017-10-12 Article PeerReviewed Murray, James W., Rance, Graham A., Xu, Fang and Hussain, Tanvir (2017) Alumina-graphene nanocomposite coatings fabricated by suspension high velocity oxy-fuel thermal spraying for ultra-low-wear. Journal of the European Ceramic Society . ISSN 1873-619X Graphene nanoplatelets ; Ceramic matrix composite ; Nanocomposite ; Nanoparticles ; Alumina ; Wear ; SHVOF ; Thermal spray http://www.sciencedirect.com/science/article/pii/S0955221917306908 doi:10.1016/j.jeurceramsoc.2017.10.022 doi:10.1016/j.jeurceramsoc.2017.10.022 |
| spellingShingle | Graphene nanoplatelets ; Ceramic matrix composite ; Nanocomposite ; Nanoparticles ; Alumina ; Wear ; SHVOF ; Thermal spray Murray, James W. Rance, Graham A. Xu, Fang Hussain, Tanvir Alumina-graphene nanocomposite coatings fabricated by suspension high velocity oxy-fuel thermal spraying for ultra-low-wear |
| title | Alumina-graphene nanocomposite coatings fabricated by suspension high velocity oxy-fuel thermal spraying for ultra-low-wear |
| title_full | Alumina-graphene nanocomposite coatings fabricated by suspension high velocity oxy-fuel thermal spraying for ultra-low-wear |
| title_fullStr | Alumina-graphene nanocomposite coatings fabricated by suspension high velocity oxy-fuel thermal spraying for ultra-low-wear |
| title_full_unstemmed | Alumina-graphene nanocomposite coatings fabricated by suspension high velocity oxy-fuel thermal spraying for ultra-low-wear |
| title_short | Alumina-graphene nanocomposite coatings fabricated by suspension high velocity oxy-fuel thermal spraying for ultra-low-wear |
| title_sort | alumina-graphene nanocomposite coatings fabricated by suspension high velocity oxy-fuel thermal spraying for ultra-low-wear |
| topic | Graphene nanoplatelets ; Ceramic matrix composite ; Nanocomposite ; Nanoparticles ; Alumina ; Wear ; SHVOF ; Thermal spray |
| url | https://eprints.nottingham.ac.uk/48050/ https://eprints.nottingham.ac.uk/48050/ https://eprints.nottingham.ac.uk/48050/ |