Investigation of the tribology behaviour of the graphene nanosheets as oil additives on textured alloy cast iron surface, Applied Surface Science http://dx.2 Graphical abstract 3
HighlightsThe tribological behavior of graphene nanosheets as lubricating oil additives on textured alloy cast iron surface were investigated using an UMT-2 ball-on-plate tribotester.A combined effect on reducing the friction and wear between graphene nanosheets additives and laser surface texturing was revealed -induce graphitizing transformation and the storing of GNS additives of the micro-dimples.EDX and Raman results showed that the graphene layers sheared at the sliding contact interfaces, and form a protective film, which is closely related with the graphene structures and surface texture patterns.4 Abstract: Tribological properties of graphene nanosheets (GNS) as lubricating oil additives on textured surfaces were investigated using a UMT-2 tribotester. The lubricating fluids keeping a constant temperature of 100°C were applied to a GCr15 steel ball and an RTCr2 alloy cast iron plate with various texture designs (original surface, dimple density of 22.1%, 19.6% and 44.2%). The oil with GNS adding showed good tribological properties (wear reduced 50%), especially on the textured surfaces (the reduction in wear was high at over 90%). A combined effect between GNS additives and laser surface texturing (LST) was revealed, which is not a simple superposition of the two factors mentioned. A mechanism is proposed to explain for these results -the graphene layers sheared at the sliding contact interfaces, and form a protective film, which is closely related with the GNS structures and surface texture patterns