Friction and Wear Performance of Sn-Based Coatings under Hydrodynamic, Mixed and Boundary Lubrication

Rizwan Bajwa, Ignacio Tudela, Rolandas Verbickas, Yi Zhang, Ion Palamarciuc

Research output: Contribution to conferenceAbstract

Abstract / Description of output

Modern developments in internal combustion (IC) engines demand higher fuel efficiency and reduced emissions which require novel high tribological performing and eco-friendly materials for key engine components. Authors in past has proposed lead-free multilayer Sn- based coatings for engine bearing applications which posses superior tribological properties compare to monolayer Sn-based coatings. They proved that the inclusion of intermetallic sublayer within Sn coating structure led to a significant improvement in the tribological performances. The current research responds to the need of further investigating the fundamental behaviour of different coating structures to support the future developments of bearing materials for engine applications. The friction and wear characteristics of Sn based coatings structures were evaluated using Bruker UMT ball-on-disc tribotest configuration. The test conditions were carefully selected to simulate close-to-engine operating environment. The Stribeck curves were generated to study the frictional characteristics under different lubrication regimes. Wear characteristics of the coatings were studied by the post-test surface analyses of wear tracks. Results revealed that the lubricious Sn-Ni intermetallic sublayer in the multilayer Sn based coatings structure contributed to its superior friction performance as compared to monolayer structure which has no such sublayer. Additionally, lesser thickness of sublayers in multilayer structure led to reduced wear.
Original languageEnglish
Publication statusUnpublished - 4 Sept 2018
Externally publishedYes
EventLeeds-Lyon Symposium on Tribology: Smart Tribology System - Leeds, United Kingdom
Duration: 4 Sept 20187 Sept 2018
Conference number: 45


ConferenceLeeds-Lyon Symposium on Tribology
Country/TerritoryUnited Kingdom
Internet address


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