James W. Murray
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
Graham A. Rance
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.
|Journal Article Type||Article|
|Journal||Journal of the European Ceramic Society|
|Peer Reviewed||Peer Reviewed|
|APA6 Citation||Murray, J. W., Rance, G. A., Xu, F., & Hussain, T. (in press). Alumina-graphene nanocomposite coatings fabricated by suspension high velocity oxy-fuel thermal spraying for ultra-low-wear. Journal of the European Ceramic Society, doi:10.1016/j.jeurceramsoc.2017.10.022|
|Keywords||Graphene nanoplatelets ; Ceramic matrix composite ; Nanocomposite ; Nanoparticles ; Alumina ; Wear ; SHVOF ; Thermal spray|
|Copyright Statement||Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0|
Final ECS Submission for Nottingham.pdf
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0
You might also like
Water-Based 3D Inkjet Printing of an Oral Pharmaceutical Dosage Form
Soot in the Lubricating Oil: An Overlooked Concern for the Gasoline Direct Injection Engine?