As mentioned above, with the increase of the content of GNPs, the agglomeration of reinforcement phase exhibits an increasing trend and thus weakens its effect to refine grains and impedes sintering and bonding, formation and growth of the sintering neck, and gap closing between Cu particles.
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Synergetic Effect of Graphene and MWCNTs on Microstructure and Mechanical Properties of Cu/Ti<sub>3</sub>SiC<sub>2</sub>/C Nanocomposites.
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The sentences
Overall, with the increase of the content of GNPs, the hardness of the sintered nanocomposites exhibited a decreasing trend.