Low friction wear resistant graphene films
AssigneeUchicago Argonne, LLC
InventorsAnirudha V. Sumant, Ali Erdemir, Diana Berman
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Abstract
A low friction wear surface with a coefficient of friction in the superlubric regime including graphene and nanoparticles on the wear surface is provided, and methods of producing the low friction wear surface are also provided. A long lifetime wear-resistant surface including graphene exposed to hydrogen is provided, including methods of increasing the lifetime of graphene containing wear surfaces by providing hydrogen to the wear surface.
Claims18
A method of forming a low friction wear surface comprising:
- disposing over a substrate a solution comprising nanodiamonds and a h-BN 2D material to form a first sliding component, the h-BN 2D material forming patches on the first sliding component;
- sliding the first sliding component against a second sliding component having a diamond-like carbon on a sliding surface;
- forming scrolls of the h-BN 2D material around the nanodiamonds;
- and
- graphitizing the nanodiamonds, converting the scrolled nanodiamonds into nano-onions.
A low friction wear surface comprising:
- a substrate;
- graphene disposed over the substrate;
- and
- nanoparticles disposed over the substrate, the nanoparticles selected from the group consisting of diamond, Ni, Fe, Pt, Co, Si3N4 and combinations thereof;
- wherein the nanoparticles are free from oxidation.
A method of forming a low friction wear surface comprising:
- preparing graphene by chemical exfoliation of highly oriented pyrolytic graphite;
- suspending the graphene in a solvent to form a solution of at least 1 mg/L;
- adding 50-1000 mg/L of nanodiamonds to the graphene solution;
- and
- forming solution processed graphene with nanodiamonds by depositing the solution on a substrate in a dry, inert environment and evaporating the solvent.
Dependencies are inferred from the claim text.