Liñeira del Río, José ManuelLópez Iglesias, EnriquetaFernández Pérez, Josefa2024-01-312024-01-312024-03-01José M. Liñeira del Río, Enriqueta R. López, Josefa Fernández, Tribological behavior of electric vehicle transmission oils using Al2O3 nanoadditives, Journal of Molecular Liquids, Volume 397, 2024, 124036, ISSN 0167-7322, https://doi.org/10.1016/j.molliq.2024.124036.0167-7322http://hdl.handle.net/10347/32147Antifriction and antiwear performances of Al2O3 nanoparticles (NPs) as additives of an automatic transmission fluid, ATF, are presented in this research. For this purpose, four nanodispersions were formulated: ATF + 0.05 wt% Al2O3 NPs, ATF + 0.10 wt% Al2O3 NPs, ATF + 0.15 wt% Al2O3 NPs and ATF + 0.20 wt% Al2O3 NPs to identify the optimal concentration of additive. Tribological experiments were taken at pure sliding conditions, with the formulated nanolubricants and the ATF, under a working load of 20 N. The four nanolubricants tested resulted in lower friction coefficients than those obtained using ATF, reaching a maximum reduction of 6 % with the ATF + 0.10 wt% Al2O3 nanolubricant. The tribological pairs tested with the Al2O3 nanolubricants show lower wear than those tested with the ATF, having the best wear decrease with the ATF + 0.10 wt% Al2O3 nanolubricant, with reductions of 45, 57 and 78 %, respectively, in diameter, depth and area of the wear scar. Furthermore, by means of confocal Raman microscopy, roughness evaluation and SEM-EDX of the worn tribological specimens, it can be determined that mending, tribo-sintering as well as rolling mechanisms occur.engAttribution-NonCommercial-ShareAlike 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-sa/4.0/ATF oilElectric vehiclesTribological mechanismsFrictionWearjournal article10.1016/j.molliq.2024.1240361873-3166open access