Low friction wear resistant graphene films

Patent metadata

Field	Value
Publication number	US-10486195-B2
Application number	US-201715408137-A
Country	US
Kind code	B2
Filing date	Jan 17, 2017
Priority date	Jun 19, 2014
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

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.

First claim

What is claimed:

1. A method of forming a low friction wear surface comprising:
disposing graphene over a substrate; and
disposing nanoparticles comprising one or more of nickel and diamond over the graphene;
forming a plurality of graphene scrolls on the substrate.

2. The method of claim 1 , wherein the nanoparticles comprise nickel and diamond and further wherein the nanoparticles have a size of about 2 nm to about 10 nm.

3. The method of claim 1 , wherein the substrate comprises a material selected from the group consisting of a metal, a transition metal and an insulator.

4. The method of claim 2 , wherein the substrate comprises at least a portion of a bearing, mold, razor blade, wind turbine, gun barrel, gas compressor, fuel cell, artificial hip joint, artificial knee joint, magnetic storage disk, scratch-free monitor, scratch-resistant monitor, television, barcode scanner, solar panel, watch, mobile phone, computer or electrical connector.

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

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

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

8. The method of claim 1 , further comprising forming a plurality of graphene segments on the graphene layer prior to disposing the nanoparticles.

9. The method of claim 8 , wherein forming the plurality of graphene scrolls includes forming at least one graphene scroll with a nanoparticle disposed therein.

10. The method of claim 9 , wherein forming the plurality of graphene scrolls comprises reacting the plurality of graphene segments with dangling bonds of the nanoparticles.

11. The method of claim 9 , wherein forming the plurality of graphene scrolls comprises:
sliding a counter surface comprising diamond-like carbon on the disposed nanoparticles and graphene;
forming graphene platelets with reactive edges; and
wrapping graphene around at least one of the nanoparticles.

Assignees

• Uchicago Argonne Llc

Inventors

• Sumant Anirudha V
• Berman Diana
• Erdemir Ali

Classifications

• B81B3/0075

  For improving wear resistance · CPC title

• F16C33/1095

  with solids as lubricant, e.g. dry coatings, powder · CPC title

• C10N2040/18

  in connection with recordings on magnetic tape or disc · CPC title

• C10N2050/02

  dissolved or suspended in a carrier which subsequently evaporates to leave a lubricant coating · CPC title

• C10N2040/17

  for electric contacts · CPC title