Back to results
US 12,173,245 B2Granted
Robust superlubricity with steel surfaces in sliding contacts
AssigneeUchicago Argonne, LLC
InventorsAnirudha V. Sumant, Venkata Aditya Ayyagari
Life of this patent
Estimating the term…
Abstract
A low friction wear surface with a coefficient of friction in the superlubric regime under a sliding and rolling movement. The low friction wear surface includes molybdenum disulfide and graphene oxide on a first wear surface with a tribolayer formed on a rough steel counter surface during the sliding and rolling movement. Methods of producing the low friction wear surface are also provided.
Claims20
A method of forming a low friction wear surface comprising:
- disposing over a substrate a solution comprising a composite of molybdenum disulfide (MoS2) and graphene oxide (GO) 100-1000 nm thick to form a layered-sandwich structure of molybdenum disulfide and graphene oxide on a first component;
- moving the first component against a steel component with a slide-to-roll ratio of 2-7%, the steel component comprising stainless steel;
- and
- forming a tribolayer on the steel component;
- wherein one of the first component and the steel component is a ball.
2 more elements
A low friction apparatus comprising:
- a first component having a substrate and further having molybdenum disulfide (MoS2) and graphene oxide (GO) disposed over the substrate;
- a second component having a substrate comprising steel with a surface roughness (Ra) of between of 200˜300 nm;
- and
- the first component and the second component in mechanical communication with a slide-to-roll ratio of 2-7%;
- wherein the mechanical communication between the first component and the second component forms a tribolayer on the second component.
2 more elements
A method of forming a low friction wear surface comprising:
- suspending solid MoS2 and GO in a solvent to form a solution of at least 1-10 g/L solids;
- depositing the solution on a substrate in a dry, inert environment;
- evaporating the solvent;
- forming a coated substrate having a coating of the solid components 100-1000 nm thick;
- engaging the coated substrate with a steel component with relative movement having a slide-to-roll ratio is 2% to 5%;
- and
- forming a tribolayer on the steel component by one or more of one of transformation of GO in the coating of solid components to amorphous carbon and shearing of MoS2 in the coating of solid components.
4 more elements
Dependencies are inferred from the claim text.