Abstract
The multi-walled carbon nanotubes (CNT) and graphene nanoplatelet (GNP) reinforced nickel matrix nanocomposites (Ni-GNP) have been processed via dry ball milling followed by a spark plasma sintering (SPS) process. The CNT and GNP content in these nanocomposites has been varied from 0.5 to 2 wt/% in order to study their effect on the microstructure and mechanical behavior of these composites. Ni-CNT/GNP powder is milled for six hours to investigate the effect on the microstructure, grain size, and the dispersion of CNT/GNP in the nickel matrix. Ni-CNT/GNP nanocomposites exhibited improvement in microhardness and mechanical performance in comparison with pure nickel. This improvement in Ni-CNT/GNP nanocomposites is primarily attributed to the uniform dispersion of reinforcement within the nickel matrix, refined grain size, and strong nickel CNT/GNP interfacial bonding, which effectively transfers stress during tensile deformation.
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