Enhancement of Thermal Conductivity and Mechanical Properties of Cu-Reduced Graphene Oxide Composites by Interface Modification
- Hunan University, College of Materials Science and Engineering (China)
Copper matrix composites reinforced with reduced graphene oxide (rGO) were fabricated via charge adsorption process, thermal reduction, and hot-press sintering process. We investigated the effect of rGO on the thermal conductivity, electrical conductivity, mechanical properties, and microstructure of the composites. By controlling the reaction process, copper on the rGO surface was oxidized to form Cu{sub 2}O. The presence of Cu{sub 2}O at the interface enhanced interfacial bonding strength and reduced the interfacial thermal resistance, thus improving the thermal conductivity and mechanical properties. This enhancement occurred at low rGO contents. By contrast, excessive amounts led to rGO agglomeration and a degradation of the performance. At the optimum rGO content of 0.6 wt.%, the composites had a 10% increase in thermal conductivity and a 46% increase in yield strength (σ{sub 0.2}), while maintaining high electrical conductivity.
- OSTI ID:
- 22970574
- Journal Information:
- Journal of Materials Engineering and Performance, Vol. 28, Issue 8; Other Information: Copyright (c) 2019 ASM International; Country of input: International Atomic Energy Agency (IAEA); ISSN 1059-9495
- Country of Publication:
- United States
- Language:
- English
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