A Review on the Significance of Hybrid Particulate Reinforcements on the Mechanical and Tribological Properties of Stir-Casted Aluminum Metal Matrix Composites

Since several years, monolithic aluminum alloys were replaced by aluminum metal matrix composites, which could be used in structural, aerospace and automotive sectors because of its superior strength and stiffness, better performance during low cycle fatigue and wear resistant. Now a days, materials got diversified from pure to composite forms as per the global needs; because of its reduced weight, cheaper, stronger, better quality which are more efficient for various applications. Recent developed metal matrix composites exhibit some important mechanical properties like low density, high strength, stiffness, better wear resistance, better toughness and stiffness. explore several applications in automotive sector. The objective of this review article is to give an insight into the latest understandings of effect of adding hybrid particulate reinforcements like aluminum oxide, silicon carbide, graphite, fly ash, zirconium, titanium silicon carbide and graphite into the aluminum metal matrix and to highlight the main concerned areas which need to be overcome if these composites could be scaled up its full commercial potential. Hence authors have concluded that when aluminum metal matrix is incorporated with graphite as a soft lubricant and Silicon carbide as a hard reinforcement can improve desirable properties like wear and strength of the composites as compared to the properties of composites which contains single reinforcement, either silicon carbide or graphite alone. These composites are substantially maintaining green or ecofriendly tribological properties, features like sustainability and energy efficient since oil and grease-based lubricants releases hazardous pollutants into atmosphere.