Rev.Adv.Mater.Sci. (RAMS)
No 1, Vol. 48, 2017, pages 71-77

NANOTWINNED COPPER-GRAPHENE COMPOSITES WITH HIGH HARDNESS

O.Yu. Kurapova, V.G. Konakov, A.S. Grashchenko, N.N. Novik, S.N. Golubev
and I.A. Ovid'ko

Abstract

This paper addresses fabrication, structure, and hardness characteristics of nanotwinned (ntw) copper-graphene composites. The composites were fabricated by electrodeposition from 1M CuSO4 · 6H2O mixed water-alcohol solution containing graphene-graphite mixture stabilized by non-ionic surfactant. We fabricated two-layer solids each consisting of ntw copper layer and ntw copper-graphene layer. The synthesized two-layer specimens were examined in nanoindentation tests and showed high hardness values up to 3 GPa. The maximum hardness value of 3 GPa is higher than those of pure ntw copper and copper-graphene composites, taken from the literature.

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