Self-Adaptive Macroscale Superlubricity Based on the Tribocatalytic Properties of Partially Oxidized Black Phosphorus

Abstract

The high-flash heat generated by direct contact at asperity tips under high contact stress and shear significantly promotes the tribocatalytic reaction between a lubricating medium and a friction interface. Macroscale superlubricity can be achieved by using additives with good lubrication properties to promote the decomposition and transformation of a lubricating medium to form an ultralow shear interface during the friction process. This paper proposed a way to achieve self-adaptive oil-based macroscale superlubricity on different tribopairs, including steel−steel and steel−DLC (diamond-like carbon), which is based on the excellent lubricating performance of black phosphorus with active oxidation and the catalytic cleavage behavior of oil molecules on the surface of oBP. This work potentially expands the industrial application of superlubricity.

Induced Decomposition and Slip Interface Transformation of Oleic Acid Enables Ultralow Wear in Boundary Lubrication

“…For instance, Zhang et al utilized oleic acid as a surface modifier to enhance the antiwear properties of graphene oxide. Gao et al proposed a method to achieve self-adaptive oil-based macroscale superlubricity on different tribopairs, leveraging the properties of oleic acid related to its interface-dependent decomposition and tribofilm formation. Consequently, there is a need to thoroughly investigate the tribological mechanism of oleic acid, given its potential presence in a lubrication system.…”