Composite coating for a plain bearing of an internal combustion engine and method of deposition

Ian Kerr (Inventor), Yi Zhang (Inventor), Elena Banchelli (Inventor), Rolandas Verbickas (Inventor), Madan Pal (Inventor), Ignacio Tudela (Inventor)

Research output: Patent


A method of electroplating a tin composite overlay coating is described. The method comprises plating a tin or tin-based matrix with embedded particles for application in bearings of internal combustion engines. A method of forming a particulate composite tin or tin-based alloy overlay on a sliding bearing. The tin composite overlay of a bearing is pulse plated from a bath containing particulates. The bath with particles is can be treated by the combination of ultrasonic and mechanical agitation. A thin layer of tin may also be applied, between the tin composition overlay and the substrate to improve the bonding. The sliding bearing also has a backing layer upon which is bonded a bearing layer, an interlayer layer may be provided on the bearing layer and the particulate composite overlay is formed on the interlayer, where the interlayer comprises tin and has a thickness of 2.5 microns or less. The composite overlay comprises particles dispersed in tin or a tin-based alloy matrix, and where the particles have an average particle size in the matrix of no more than 1.0 micron and the overlay has a thickness of 5-50µm. The content of particles in the overlay matrix is from 1.5 to 5.0 wt%.
Original languageEnglish
Patent number GB2529384
Publication statusPublished - 7 Sep 2016
Externally publishedYes


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