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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) as lubricant additive in white oil. The tribological tests were carried out on steel-steel contacts using reciprocating ball-on-disk tribometer. Compared with white oil, addition of 0.1 wt. % h-BN/GF reduced the friction coefficient, wear rate and wear depth by 41.1 %, 89.1 %, and 92.3 %, respectively. Furthermore, when the mass ratio of h-BN and GF is 1:1 and the content of h-BN/GF nanocomposites is 0.1 wt. % the white oil show the best lubrication and wear resistance performance. Finally, the synergistic lubrication mechanism was investigated, the unique microstructure of the h-BN/GF composite and weak interfacial interaction between h-BN and GF contributed to the formation of continuous and adhesive tribo-films at the interface.

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