Avaliação tribológica de um lubrificante aditivado com nanopartículas de carbono amorfo

Abstract

This work is focused on analysing the tribological influence of different dispersion values of amorphous carbon nanoparticles in a epoxidized soy-based oil. Four mass concentrations of the lubricant were evaluated, with 0%, 0,05%, 0,1% and 0,2% of nanoparticles. Tests were performed on a pin-on-disc tribometer during sixty minutes with normal load of 100 N, at linear speed of 0,314 m/s, in which a sphere ball, made of SAE 52100 steel, with 8 mm of diameter was pressed against a 1045 steel disc. A high speed camera was used for evaluate the maintenance of lubricante on the contact surface and its aspects during the tests. The results showed that the addition of nanoparticles initially has a significant effect on the friction coefficient of the lubricant, as well as on the lubricant heat transfer capacity.