Lubricating Characteristic of Grease Composites with CNT Additive

Abstract

The friction at high speed and high pressure tends to cause the lowering of grease stickiness because the frictional heating occurs at the sliding surface, which will bring to the degradation of lubricity. In order to improve the lubricity, carbon nanotubes (CNTs), which has excellent heat conductivity, was added as an additive into the different types of greases. Two kinds of the CNTs, which were synthesized by a floating catalyst method at different annealing temperatures, were used. The sliding experiments were conducted to study the tribological performance of the grease composites by varying the added amounts of CNTs and were compared to the original greases. As a result, it was found that the CNTs improved both the friction and the wear properties. The optimum content of the CNTs in the grease composites was 0.3 mass%.

Synthesis and tribological properties of nanogrease

“…However, few works have been reported on grease using CNTs (Mohamed et al, 2015;Kobayashi. et al, 2005;Joly-Pottuz and Dassenoy, 2004;Yang et al, 2011;Bhaumik et al, 2013;Kamel et al, 2016aKamel et al, , 2016bKamel et al, 2017aKamel et al, , 2017bHamdy et al, 2017;Khalil et al, 2016).…”

Nanoscale Functional Additives Application in the Low Temperature Greases

“…A promising direction for improving the anti-wear and anti-scuffing properties is the use of nanostructured functional additives (NFA). It is known that nanosized carbon materials like nanotubes [4][5][6], graphene [7,8], nanodiamonds [9][10][11], metal nanoparticles, and its oxides [12][13][14][15][16][17] are widely used as fillers for greases. Some metal containing and boron compounds can also be used [18][19][20][21][22][23][24][25].…”