Effects of Aviation Lubrication on Tribological Performances of Graphene/MoS2 Composite Coating

Four kinds of aviation liquid lubricants (i.e., 4010(#), 4050(#), 4106(#), and 4109(#) oils) were homogeneously coated on the graphene/MoS2 composite coating through a spin-coating method to form the solid-liquid lubricating combinations. The tribological properties of the obtained solid-liquid combinations and pure graphene/MoS2 coating were investigated experimentally. Effects of the liquid lubricant type on the friction and wear behaviors of the solid-liquid combinations and pure graphene/MoS2 coating were studied at different applied loads and rotational speeds. Within the ranges of the applied load varying from 10 to 50 N and rotational speed varying from 750 to 1500 rpm, the presence of the above-mentioned liquid lubricants significantly reduces the friction coefficient of the pure graphene/MoS2 coating, and the reduction rate is as high as 24%. Additionally, the coating-4109(#) combination has the best synergistic effect under the above operation condition.

Automated summary

Four types of aviation liquid lubricants were coated on a graphene/MoS2 composite coating to form solid-liquid lubricating combinations, which significantly reduced the friction coefficient of the coating and showed the best synergistic effect under certain conditions. The study investigated the effects of different liquid lubricant types on friction and wear behaviors, highlighting the potential of these combinations for improving tribological properties.