|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Metal and Polymer Matrix Composites II
||Self-Lubricating Aluminum Matrix Nanocomposites Reinforced by Graphene Nanoplatelets
||Meysam Tabandeh-Khorshid, Emad Omrani, Pradeep L Menezes, Pradeep K Rohatgi
|On-Site Speaker (Planned)
Self-lubricating aluminum matrix nano composites found applications from aerospace, automotive, marine to recently in nano-devices. In the present investigation, aluminum matrix nanocomposites reinforced by graphene nanoplatelets were synthesized by powder metallurgy method. More specifically, the graphene nanoplatelets were dispersed and exfoliated in ethanol by ultrasonic vibration. Then, the slurry was poured into an attritor mill and aluminum powders were added into this slurry. Finally, composite powders were consolidated in two steps compaction process, including single action cold compaction followed by single action hot compaction in order to prepare the samples. For comparison purpose, pure aluminum samples were also produced with the same method. To investigate the tribological behavior of aluminum matrix nanocomposites reinforced by GNPs and pure aluminum, pin-on-disk experiments were conducted on the prepared samples. The tests were conducted under dry conditions at various normal loads and sliding speeds for different weight fraction of graphene in the composites. Optical and Scanning Electron Microscope was used to characterize the transfer layer formation on the counterpart and morphology of the worn surfaces of aluminum and composite samples. The influence of reinforcement, volume fraction, normal load, and sliding velocity on the tribological performance was investigated. It was found that the GNPs reinforced nano-composites showed superior tribological properties and demonstrated the ability of the self-lubricating nature of the composite during tribological conditions.
||Planned: A print-only volume