Synergistic Lubricating Performance of h-BN/GF Nanoparticles as Oil Additives for Steel-Steel Contact
Shuai Li, Ma Qiang, Zhe Tong, Qi Liu, Guangneng Dong
Abstract
Abstract The major objective of this work is to investigate the synergistic lubricating performance of hexagonal boron nitride (h-BN) and graphite fluoride (GF) nanoparticles (NPs) in white oil. The tribological tests were carried out on steel-steel contacts using a reciprocating ball-on-disk tribometer. Compared with white oil, an addition of 0.1 wt% h-BN/GF could reduce the friction coefficient, wear-rate and wear depth by 41.1%, 89.1%, and 92.3%, respectively. Furthermore, compared with 0.1 wt% h-BN and 0.1 wt% GF, 0.1 wt% h-BN/GF nanocomposite also showed the best lubrication and wear resistance performances. The synergistic lubrication mechanism of h-BN/GF nanocomposite was investigated, and the unique microstructure of the h-BN/GF composite and the weak interfacial interaction between h-BN and GF were found to be beneficial to the formation of continuous and adhesive tribo-films at the interface.