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US 8,007,178 B2Granted
Bearing materials and method for the production thereof
AssigneeMahle Engine Systems Ltd.
InventorsCarl Perrin, Ian Matthew Laing
Life of this patent
Estimating the term…
Abstract
A plain bearing and a method for the production thereof is described, the method being for the deposition on a substrate of a layer of material having a metallic matrix, the method comprising the steps of: producing a powder of a desired aluminium-based alloy composition having a predetermined oxide content; depositing said aluminium alloy powder onto a bearing substrate by a metal spraying technique.
Claims13
A plain bearing for an internal combustion engine;
- the bearing comprising a backing material, a layer of a first bearing material on the backing material and an overlay layer of a second bearing material on the first bearing material wherein said second bearing material is an alloy bearing material that has been produced by spraying of a powder having the composition of the second bearing material, wherein said powder composition comprises from 0.5 to 5 weight % of aluminium oxide in the form of a coating on individual powder particles, said aluminium oxide being non-homogeneously distributed, on a micro-scale, through a matrix of the layer of second bearing material in a network of oxide particles, said network generally corresponding to a morphology of the coated sprayed particles during deposition of said layer of said second bearing material.
A bearing comprising a substrate having an overlay layer of an aluminium-based alloy bearing material deposited thereon;
- there being an interface between the substrate and the overlay bearing material;
- said interface having a varying roughness profile over an area of the substrate;
- said bearing having a pre-determined total wall thickness of said substrate and said bearing material formed by machining of said deposited bearing material such that said bearing has a varying thickness of bearing material on said substrate wherein the bearing material has been produced by spraying of a powder comprising from 0.5 to 5 weight % of aluminium oxide in the form of a coating on individual powder particles, said aluminium oxide being non-homogeneously distributed, on a micro-scale, through a matrix of the overlay layer of the bearing material in a network of oxide particles, said network generally corresponding to a morphology of the coated sprayed particles during deposition of said overlay layer of said bearing material.
Dependencies are inferred from the claim text.