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Tribological Behavior Of Spark Plasma Sintered Aluminum-Graphene Composites At Room And Elevated Temperatures, Sara Rengifo, Cheng Zhang, Sandip Harimkar, Benjamin Boesl, Arvind Agarwal
Tribological Behavior Of Spark Plasma Sintered Aluminum-Graphene Composites At Room And Elevated Temperatures, Sara Rengifo, Cheng Zhang, Sandip Harimkar, Benjamin Boesl, Arvind Agarwal
Department of Mechanical and Materials Engineering
This study examines the role of Graphene nanoplatelets (GNPs) as a solid lubricant additive to aluminum. Pure Al and Al-2 vol % GNP pellets are sintered by Spark Plasma Sintering (SPS). Their tribological properties are evaluated by a ball-on-disk tribometer at room temperature (RT) and high temperature (200 °C). Al-2 vol % GNP composite displayed poor densification (91%) and low hardness, resulting in poor wear resistance as compared to pure Al. However GNP addition resulted in a lower coefficient of friction (COF) as compared to pure aluminum at both temperatures. The results demonstrated that GNPs contribute to reducing COF by …