Antifriction Composite Material Based on Alloy of Al–Sn System

The structure and tribological behavior of composite materials (CM) based on the AO20-1 alloy produced by casting method by mixing particles of the Ti2NbAl intermetallic compound into the melt were studied. Tribological tests of the samples were carried out under conditions of dry sliding friction according to the axial loading scheme of a rotating disk sample using a fixed sleeve made of steel 45X (HRC > 63) as a counterface. It has been established that, as a result of a decrease in Al grain size during the rapid crystallization of the matrix alloy and the introduction of a discrete powder of an intermetallic compound into the alloy, the friction coefficient of the CM decreases by half. The wear resistance of CM increases by 2.5 times, which is associated with the influence of particles of solid intermetallic metal, limiting plastic deformation and entrainment of the matrix material.