Microstructure, Electrical Conductivity and Hardness of Multi layer Graphene/Copper Nanocomposites Synthesized by Flake Powder Metallurgy


Varol T., Canakci A.

METALS AND MATERIALS INTERNATIONAL, cilt.21, ss.704-712, 2015 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 21 Konu: 4
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1007/s12540-015-5058-6
  • Dergi Adı: METALS AND MATERIALS INTERNATIONAL
  • Sayfa Sayıları: ss.704-712

Özet

In this study, the influence of multilayer graphene content on the green and sintered properties of the multilayer graphene/Copper nanocomposites was investigated. Flake powder metallurgy, as a new production method, was employed to prepare the multilayer graphene reinforced copper matrix nanocomposites. Results showed that the increase in agglomeration content inhibited particle-particle contact during the sintering process and therefore sintered density decreased with increasing the multilayer graphene content. The green density of 8.46 g/cm(3) was found for the monolithic Cu sample, which was 16.4% higher than that of the 5 wt% MLG/Copper nanocomposites. The high conductivity value (78.5 IACs) was obtained with 0.5 wt% the multilayer graphene reinforced nanocomposites. The electrical conductivity of sintered 5 wt% the multilayer graphene/Copper nanocomposites was 61.48 IACs. When the amount of the multilayer graphene particles as higher than 3 wt%, the decreasing rate in hardness significantly increased. The decreasing rate in the hardness of the multilayer graphene/Copper nanocomposites can be attributed to decrease in density and the non-homogeneous distribution of multilayer graphene particulates in Cu matrix.