▎ 摘　　要

NOVELTY - Sliding component (100) comprises an overlay (106) comprising graphene platelets functionalized with -O and/or -F functional groups within a matrix of a polymeric or plastics material. USE - The sliding component is useful in engine (claimed), e.g. internal combustion engine; and used for sliding bearing assemblies such as bearing shells, bushes, bearing surfaces of crankshafts, bearing surfaces of camshafts, bearing surfaces of connecting rods, thrust washers, flanges, bearing surfaces of a bearing block, bearing surfaces of a bearing cap, and piston assembly components such as piston rings, piston skirts, and cylinder walls and cylinder liners. ADVANTAGE - The presence of -O and/or -F functionalized graphene platelets may both increase the seizure load of the overlay and improve the consistency of the overlay's performance. Additionally, overlays containing -O and/or -F functionalized graphene platelets may exhibit the improved seizure resistance over a large temperature range. Overlays may thus advantageously improve seizure performance across the entire range of bearing temperatures that may be experienced during operation of an internal combustion engine. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) an overlay material comprising a matrix of polymeric material, and, within the matrix, graphene platelets functionalized with -O and/or -F; (2) a graphene platelet filler for an overlay material, comprising graphene platelets functionalized with -O and/or -F; (3) forming an overlay for a sliding component, which involves mixing a polymeric material with graphene platelets functionalized with -O and/or -F, to form a dispersion; and depositing the dispersion onto a substrate; and (4) an engine comprising the sliding component. DESCRIPTION OF DRAWING(S) - The drawing shows a three-quarter view of semi-cylindrical bearing shell. Sliding component (100) Backing (102) Lining layer (104) Overlay (106)