# US 11,441,097 B2 · Low friction wear resistant graphene films

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- Number: US 11,441,097 B2
- Document ID: US11441097B2
- Status: Granted
- Kind: B2
- Application number: 16/932,202
- Filed: 2020-07-17
- Published: 2021-01-07
- Granted: 2022-09-13
- Earliest claimed: 2017-02-09
- Assignees: Uchicago Argonne, LLC
- Applicants: Uchicago Argonne, LLC
- Inventors: Anirudha V. Sumant; Ali Erdemir; Diana Berman
- Web page: https://patentgrep.com/patent/US11441097B2

## CPC

- C10M 171/06: Particles of special shape or size
- B05D 1/02: performed by spraying
- C09D 1/00: Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
- C10M 111/02: at least one of them being a non-macromolecular organic compound
- C10M 177/00: Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes
- C10M 2201/041: Carbon; Graphite; Carbon black
- C10M 2201/0413: used as base material
- C10M 2201/05: Metals; Alloys
- C10M 2201/053: used as base material
- C10M 2201/061: Carbides; Hydrides; Nitrides
- C10M 2201/0663: used as base material
- C10M 2201/10: Compounds containing silicon
- C10N 2020/06: Particles of special shape or size
- C10N 2030/06: Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
- C10N 2040/02: Bearings
- C10N 2040/17: {for electric contacts}
- C10N 2040/18: in connection with recordings on magnetic tape or disc
- C10N 2040/242: {Hot working}
- C10N 2040/30: Refrigerators lubricants {or compressors lubricants}
- C10N 2040/36: Release agents {or mold release agents}
- C10N 2050/02: dissolved or suspended in a carrier which subsequently evaporates to leave a lubricant coating
- C10N 2070/00: Specific manufacturing methods for lubricant compositions
- C10M: LUBRICATING COMPOSITIONS (well drilling compositions C09K8/02); USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION (mould release, i.e. separating, agents for metals B22C3/00, for plastics or substances in a plastic state, in general B29C33/56, for glass C03B40/02; textile lubricating compositions D06M11/00, D06M13/00, D06M15/00; immersion oils for microscopy G02B21/33)
- B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02)
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- C10N: INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS

## 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.

## Claims

### Claim 1

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 an amorphous carbon core; and
graphitizing the nanodiamonds, converting the scrolled nanodiamonds into nano-onions.

### Claim 2 (depends on 1)

The method of claim 1, further comprising establishing a dry environment over the substrate.

### Claim 3 (depends on 1)

The method of claim 1, wherein disposing the solution over the substrate comprises forming patches of the material on the substrate.

### Claim 4 (depends on 1)

The method of claim 1, wherein forming patches of the material on the substrate comprises spraying a liquid containing the material onto the substrate.

### Claim 5 (depends on 1)

The method of claim 1, wherein disposing the nanoparticles over the substrate comprises spraying a liquid containing the nanoparticles onto the substrate.