Tribological properties of graphene nanoplatelets or boron nitride nanoparticles as additives of a polyalphaolefin base oil

In this work, antifriction and antiwear capabilities of hexagonal boron nitride nanoparticles (h-BN) or graphene nanoplatelets (GnP) as additives a polyalphaolefin neat oil (PAO 40) were studied at pure sliding conditions. For purpose, eight PAO 40 nanodispersions prepared: four with h-BN others based on GnP. The mass concentrations these dispersions are 0.25, 0.50, 0.75 1.00 wt% 0.05, 0.10. 0.25 0.50 GnP, having all them good stability against sedimentation (at least 96 h). Tribological assays carried prepared nanolubricants well base 20 N load. All GnP showed lower friction coefficients in comparison to the non-additivated oil, maximum decrease 21% for nanodispersion. Regarding produced wear, disks lubricated wear than those using 40. greatest reduction track width (22%) was also achieved nanolubricant. Moreover, through confocal Raman microscopy roughness analyses worn it can be concluded that reductions due surface repairing tribofilm formation mechanisms. • best behavior Maximum 22% found lubricant. 20% 13%. Surface mechanisms occur nanoadditives.