Graphene Ceramic Binary Powder Reinforced Aluminum Matrix Composites and Their Characterizations
Mevlüt Gürbüz Mahmut Can Senel Erdem Koc
AbstractAluminum matrix composites are widely used in automotive, aviation and aeronautics industry due to their high strength, good stiffness, low density, good thermal and electrical properties. Developments of these composites with unique reinforcements are essential to enhance the composite properties. In recent years, graphene nanoplatelets (GNPs) and its ceramic combinations such as silicon carbide (SiC) and silicon nitride (Si3N4) have been rarely preferred to fabricate high-performance aluminum composites. In this study, binary SiC/graphene and Si3N4/graphene reinforced aluminum composites were fabricated by powder metallurgy method for various reinforcement content. From the results, the hardness of the composites has been increased by graphene and its ceramic combinations. While pure Al and Al-0.15%GNPs composite hardness were reported as nearly 52 and 56 in our previous studies, in this study the highest hardness has been measured as 85.2 HV and 82.01 HV for Al30%SiC-0.5%GNPs and Al-9%Si3N4-0.5%GNPs respectively.