Friction and wear characteristics of different Pb-free bearing materials in mixed and boundary lubrication regimes

摘要: Abstract Traditional bearing materials contain different amounts of lead (Pb) because its friction reducing properties. However, in view the negative health and environmental impact Pb, there is growing emphasis on restricting usage Pb engine bearings. Owing to this, new that provide at least comparable tribological performance containing alloys are being developed some Pb-free already used applications. It is, however, still unclear how these would perform mixed boundary lubricated conditions. In this study, a block-on-ring test setup was employed investigate several bi-metal multi-layer with compositions lining overlay plating. Pb-containing material also studied as reference material. Friction wear properties were investigated their mechanisms under conditions have been analysed. Bearing Polyamide-Imide based graphite MoS 2 exhibited better than Pb-based Al–Sn materials. shows higher has shown compared other