Effect of H2 Reduction Temperature on the Properties of Reduced Graphene Oxide and Copper Matrix Composites

doi:10.1007/s40195-014-0146-z

Abstract

Abstract:

Reduced graphene oxide (RGO) and copper composites (RGO/Cu) were successfully fabricated based on a molecular-level mixing method (MLM). The composite powders were reduced in H₂ at 350, 450, and 550 °C and then consolidated by spark plasma sintering (SPS) in order to evaluate the effect of H₂ reduction temperature on the properties of the composites. The results indicate that the strengths of the composite decrease with the increase of H₂ reduction temperature, while the electrical conductivity reaches its maximum at 450 °C and minimum at 550 °C. Hot rolling could benefit the electrical conductivity. The yield strength of the RGO/Cu composite reduced to 337 MPa at 350 °C. The electrical conductivity of the RGO/Cu composite reduced at 450 °C after hot rolling reaches 60.26% IACS. The properties of the RGO/Cu composites can be designed by adjusting the reduction degree of RGO and by hot rolling.

Key words: Nanostructure, Copper, Composites, Hydrogen, Mechanical properties

Wang Lidong, Cui Ye, Li Ruiyu, Cao Guojian, Li Bin, Fei Weidong. Effect of H₂ Reduction Temperature on the Properties of Reduced Graphene Oxide and Copper Matrix Composites[J]. Acta Metallurgica Sinica (English Letters), 2014, 27(5): 924-929.

Figures/Tables 5

Fig. 1 a Raman spectrum of GO; b XRD spectra of RGO/Cu-450 composite powders before and after reduction and the RGO/Cu-450 composite

Fig. 2 C1 s XPS spectra of the composites: a RGO/Cu-350; b RGO/Cu-450; c RGO/Cu-550

Fig. 3 SEM of the surface of RGO/Cu-450 a, fractographs of RGO/Cu-350 b, c; RGO/Cu-550 d

Fig. 4 Mechanical properties of the composites: a compressive stress-strain curves of composite with different H2 reducing temperature; b compressive stress of composites; c hardness of composites; d tensile stress-strain curve of RGO/Cu-550(R), the inset shows the dimensions (in mm) of tensile sample

Fig. 5 Conductivities of RGO/Cu composites

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Effect of H₂ Reduction Temperature on the Properties of Reduced Graphene Oxide and Copper Matrix Composites

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