On the properties of composites based on sintered bronze with alumina additives

This paper describes the changes in some structural, mechanical and tribological properties of an MMC based on sintered Cu–Sn bronze reinforced by an alumina additive. If a correct percentage of the additive is added, the values of the MMC bending strength and strength limit in compression do not change, but a reduction of the friction coefficient and the wear rate is observed in the case of both the concentrated and distributed contact of the MMC with C45 steel is observed. SEM analysis indicates events of abrasive and adhesive wear of friction surfaces of the MMC and C45 steel and also mass transfer.