Sub-nanometer Magnetostriction Effect Induced Tribological Behavior of Graphene Sheets Embedded Surface

No.51605369

In recent years, researches on controlling surface tribological behavior at the atomic scale in nano-mechanical system have attracted a lot of interests. The atoms rearrangement at the contact interface induced by magnetostriction effect under magnetic field makes it possible for the atomic-scale control of tribological behavior. Therefore, this application proposed a scientific problem of “Sub-nanometer magnetostriction effect induced tribological behavior of graphene sheets embedded surface”, and will carry out researches on the origin of sub-nanometer magnetostriction effect of embedded graphene sheets and the nano-scale friction and wear behavior of graphene sheets embedded surface induced by the magnetostriction effect. Combining the measurements of the charge distribution of graphene sheets embedded surface under magnetic field and density functional theory, the origin of magnetostriction effect is explored based on the spin electron coupling effect. Nano-friction tests are conducted under magnetic field to evaluate the friction force of the graphene sheets embedded surface as a function of the magnetic field intensity, and the tuning effect of the magnetostriction effect induced real contact area variation on the friction force is clarified. Nano-wear tests are performed under magnetic field to obtain the wear depth of the graphene sheets embedded surface as a function of the magnetic field intensity, and the influencing mechanism of the magnetostriction effect induced bond structure change on the nano-wear is elucidated. This research will provide new method for the controlling of the nano-surface tribological behavior.