Abstract
Silver-based bulk materials containing Ag/reduced graphene oxide (Ag/rGO) nanocomposite were prepared via a two-step procedure. First, a one-pot procedure was used to form Ag/rGO nanocomposites from AgNO3 and GO using hydrazine as a reductant. Then, Ag/rGO nanocomposites with various graphene contents were mixed with silver nanopowder and consolidated using spark plasma sintering. The hardness of the bulk material increased to 70 HV when the graphene content was increased to 2.5 wt.%. The bulk densification varied from 87.2% to 96% and was highest at graphene content of 2.5 wt.%. The conductivity (43.00–53.73 MS/m) was highest at 0.7 wt.% graphene content. The variation of the intensity and conductivity is mainly related to the formation of Ag-C bonds, while the variation of the density is mainly related to the sintering process.
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