Superlubricating graphene and graphene oxide films

Patent metadata

Field	Value
Publication number	US-9890345-B2
Application number	US-201314415499-A
Country	US
Kind code	B2
Filing date	Jul 18, 2013
Priority date	Jul 19, 2012
Publication date	Feb 13, 2018
Grant date	Feb 13, 2018

Abstract

A system and method for forming at least one of graphene and graphene oxide on a substrate and an opposed wear member. The system includes graphene and graphene oxide formed by an exfoliation process or solution processing method to dispose graphene and/or graphene oxide onto a substrate. The system further includes an opposing wear member disposed on another substrate and a gas atmosphere of an inert gas like N 2 , ambient, a humid atmosphere and a water solution.

First claim

The invention claimed is:

1. A solution processed wear member article of manufacture, comprising:
a first substrate;
oil free solution processed graphene oxide flakes deposited on the first substrate; and
a second substrate forming an opposing wear member of the solution processed material disposed on the first substrate, the second substrate comprising a diamond-like coating (DLC);
wherein the first substrate and the second substrate interact oil free.

2. The solution processed wear member as defined in claim 1 wherein the first substrate is selected from the group of a steel and a transition metal.

3. The solution processed wear member as defined in claim 2 wherein the transition metal is selected from the group of Cu and Ni.

4. The solution processed wear member as defined in claim 1 wherein the second substrate comprises a metal.

5. The solution processed wear member as defined in claim 1 further including an inert environment surrounding the first substrate and the second substrate consisting of at least one of, N 2 , Ar and a high vacuum.

6. The solution processed wear member as defined in claim 1 wherein the graphene form of the wear member has a coefficient of friction of about 0.003-0.005 in selected atmospheres and the graphene oxide has a coefficient of friction of about 0.15-1.0 in selected atmospheres.

7. A graphene wear member article of manufacture, comprising:
a housing having deposited therein:
a first substrate;
a dry, oil free layer of solution processed graphene oxide flakes disposed on the first substrate;
a second substrate forming an opposing wear member of the layer of solution processed graphene oxide on the first substrate; and
the first substrate and second substrate housed in a dry, inert environment within the housing.

8. The graphene wear member article of manufacture of claim 7 wherein the dry, inert environment is selected from the group consisting of N 2 , Ar and a high vacuum.

Assignees

• Uchicago Argonne Llc

Inventors

• Sumant Anirudha V
• Erdemir Ali
• Choi Junho
• Berman Diana

Classifications

• C10N2070/00

  Specific manufacturing methods for lubricant compositions · CPC title

• C10N2050/08

  Solids · CPC title

• B05D1/02

  performed by spraying · CPC title

• C10M2201/0413

  used as base material · CPC title

• C10N2030/06

  Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure · CPC title