Synergistic Lubricating Performance of h-BN/GF Nanoparticles as Oil Additives for Steel-Steel Contact

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) 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.

Tribological properties of hexagonal boron nitride nanoparticles as a lubricating grease additive

“…Various solid additives, 2 such as graphene 3–6 and molybdenum disulfide (MoS 2 ), 7–9 were added to grease to further improve its tribological performance. The hexagonal boron nitride (h‐BN) has a layered crystal structure, creating low interfacial shear strength so that it becomes a compelling alternative to other inorganic solid lubricants 10–12 . Therefore, the h‐BN particle has also been widely added into grease for improving lubrication and anti‐wear performance.…”

“…The hexagonal boron nitride (h-BN) has a layered crystal structure, creating low interfacial shear strength so that it becomes a compelling alternative to other inorganic solid lubricants. [10][11][12] Therefore, the h-BN particle has also been widely added into grease for improving lubrication and anti-wear performance. For example, the h-BN micro-particles with a diameter of 4-10 μm served as a lubricating grease-2 additive, and the experimental results showed that appending h-BN to the grease-2 resulted in an excellent property in the shaft-sleeve slide regime.…”

Enhanced tribological properties of copper metal-matrix composites reinforced with fluorinated graphene oxide nanosheets

“…Furthermore, low graphitic loadings (sub-10 wt%) into copper films greatly diminish frictional losses under low contact pressure nano-and macrotribological testing. 44,45,21 Fluorographenes have been utilized in oil-based [46][47][48][49] and polymer-based [50][51][52] lubricating formulations. However, the incorporation of fluorographenes into metal composites have scarcely been explored.…”

Tribology of Copper Metal-Matrix Composites Reinforced with Fluorinated Graphene Oxide Nanosheets: Implications for Solid Lubricants in Mechanical Switches

“…66 Furthermore, low graphitic loadings (sub-10 wt%) into copper films greatly diminish frictional losses under low contact pressure nano-and macrotribological testing. 38,67,68 Flurographenes have been utilized in oil-based [69][70][71][72][73] and polymer-based [74][75][76] lubricating formulations. However, the incorporation of fluorographenes into metal composites has scarcely been explored.…”