Friction and wear characteristics of different Pb-free bearing materials in mixed and boundary lubrication regimes
2014 (English)Conference paper, Presentation (Refereed)
Traditional bearing materials contain different amounts of lead (Pb) because of its friction reducing properties. However, in view of the negative health and environmental impact of Pb, there is growing emphasis on restricting the usage of Pb in engine bearings. Owing to this, new bearing materials that provide at least comparable tribological performance to that of Pb containing alloys are being developed and some new Pb-free materials are being already used in engine bearing applications. It is, however, still unclear how these newengine bearing materials would perform in mixed and boundary lubricated conditions. In this study, a block-on-ring test setup was employed to investigate the tribological performance of several bimetal and multi-layer Pb-free bearing materials with different compositions of bearing lining and overlay plating. Pb-containing bearing material was also studied as a reference material. Friction and wear properties of these bearing materials wereinvestigated and their wear mechanisms under lubricated conditions have been analysed. Bearing material with overlay of Polyamide-Imide with graphite and MoS2 exhibited better friction and wear properties than Pb-based and Al-Sn based materials. Pb-containg bearing material shows higher wear and Al-Sn based material has shown higher friction.
Place, publisher, year, edition, pages
Research subject Machine Elements
IdentifiersURN: urn:nbn:se:ltu:diva-30800Local ID: 4bec1b34-0b39-494d-b036-3ac524d374d6OAI: oai:DiVA.org:ltu-30800DiVA: diva2:1004029
Nordic Symposium on Tribology : 10/06/2014 - 13/06/2014
Godkänd; 2014; 20140619 (andbra)2016-09-302016-09-30Bibliographically approved