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Influence Of Graphene Nanoplatelets (GNPs) On Compressibility And Sinterability Of Al Matrix Nanocomposites Prepared By Powder Metallurgy

  • : Abdollah Saboori1, Mario Pietroluongo1, Matteo Pavese1, Claudio Badini1, Paolo Fino1, Mehran Dadkhah1
  • : 1Polytecnico di Torino
  • : PDF Download
  • : 2016

Abstract

The compaction behavior of an Al matrix reinforced with different weight percentages (0, 0.5, 1.0, 1.5 and 2.0 wt.%) of graphene nanoplatelets (GNPs) produced by a novel wet method followed by a conventional powder metallurgy was studied. GNPs were added by a wet mixing method to avoid structural damage. The composite powder mixture were consolidate via a cold uniaxial compaction. The samples were sintered at different temperatures (540, 580 and 620 °C) under flow of N2 to assess the sinterability of the composites. The crystallite size and lattice parameter of the composites were calculated. The relative density, compressibility, sinterability and Vickers hardness of the composites were also evaluated. The effects of GNPs on the consolidation behavior of the matrix were studied by using  the Heckel, Panelli and Ambrosio Filho and Ge equations. The fabricated composites exhibited high Vickers hardness of 55 HV5, which is approximately 50% higher than pure Aluminum.

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