Comparative Analysis of Tribological Behavior in Aluminum Matrix Composites Incorporating Fe75Si15Zr5B5 Metallic Glass and SiC Particles

In this study, a comparative investigation was conducted to assess the impact of Fe-based metallic glass (FMG) and silicon carbide (SiC) reinforcing particles on the tribological properties of aluminum matrix composites. The composites were synthesized using the powder metallurgy method, and subsequent dry sliding wear tests were performed by a pin-on-disc machine at ambient temperature. Thorough examinations of the microstructure, mechanical properties, and densification behavior were carried out for the developed composites, and these findings were then correlated with their wear performance. To gain insights into the wear mechanisms, comprehensive characterizations of the worn surfaces and debris were conducted utilizing field-emission scanning electron microscopy (FESEM) and energy-dispersive spectroscopy (EDS) analysis. The outcomes of the dry sliding tests revealed that, in contrast to SiC, the addition of FMG reinforcing particles significantly decreased the friction coefficient while concurrently enhancing the wear resistance of the aluminum matrix. The microstructural investigations divulged that the pure aluminum sample experienced severe abrasive and adhesive wear mechanisms, which were effectively mitigated through the incorporation of FMG particles, due to the formation of an oxide tribolayer in the composite during the wear test. Conversely, the SiC-reinforced composites exhibited a dominant wear mechanism characterized by severe delamination, which consequently contributed to their elevated wear rate. These findings shed light on the distinct effects of FMG and SiC particles on the tribological properties of aluminum matrix composites, providing valuable insights for potential applications in engineering and industrial sectors, particularly in scenarios involving metal-to-metal contact.