Abstract
The tribological behaviors of nanoparticles (NPs) have received
extensive application in the fields of nano-lubrication and
ultra-precision manufacturing. The frictional and dynamic behaviors of
SiO2 NPs acted with the single asperity were studied on silicon surface
utilizing atomic force microscope. Both the static and kinetic friction
forces of NPs exhibit an initial decrease followed by an increase with
the increasing manipulation load (0 ~ 300 nN). The
nonmonotonic load-dependence of friction behavior matches the dynamic
transformation of “sliding-rolling-sliding” motion state of the
manipulated NPs, which can be predicted by a Double-Hertz model and
further confirmed by the nanoindentation marked NPs. This research has a
great guiding significance for the regulated dynamic behaviors of NPs in
the current three-body abrasive tribology.