Dry sliding wear and viscoelastic performance of aluminum-based hybrid composites reinforced with SiC and metallic glass particles

Abstract

In this research, a new type of bulk hybrid composites containing different amounts of Fe-based metallic glass (FMG) and SiC particles were successfully produced. FMG and SiC particles with varying percentages of volume were mixed with pure Al matrix and integrated by spark plasma sintering (SPS) method. The dynamic mechanical thermal properties, coefficient of friction and wear rates, hardness, and density of the composite were investigated. The results showed that the addition of FMG and SiC particles improved the wear resistance, hardness value, and storage modulus and slightly decreased the [Formula: see text] and relative density of pure Al. Also, replacing some SiC particles with FMG particles in the hybrid samples, in addition to the change of the dominant wear mechanism, led to the higher storage modulus and hardness values. It was found that the formation of a mechanically mixed layer during the wear test resulted in a reduction in the coefficient of friction. Compared to pure Al, the amounts of the increase in storage modulus and hardness of samples reinforced with 3 vol. % of SiC and 7 vol. % of FMG particles were 24.70% and 68.40%, respectively. The morphological analysis of the hybrid composites demonstrated that the amorphous structure of the FMG particles was preserved.