Development of Al- and Cu-based nanocomposites reinforced by graphene nanoplatelets: Fabrication and characterization
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Aluminum and copper matrix nanocomposites reinforced by graphene nanoplatelets (GNPs) were successfully fabricated by a wet mixing method followed by conventional powder metallurgy. The uniform dispersion of GNPs within the metal matrices showed that the wet mixing method has a great potential to be used as a mixing technique. However, by increasing the GNPs content, GNPs agglomeration was more visible. DSC and XRD of Al/GNPs nanocomposites showed that no new phase formed below the melting point of Al. Microstructural observations in both nanocomposites reveal the evident grain refinement effect as a consequence of GNPs addition. The interfacial bonding evaluation shows a poor interfacial bonding between GNPs and Al, while the interfacial bonding between Cu and GNPs is strong enough to improve the properties of the Cu/GNPs nanocomposites. In both composites, the coefficient of thermal expansion decreases as a function of GNPs while, their hardness is improved by increasing the GNPs content as well as their elastic modulus.
Keywordsnanocomposite aluminum copper graphene microstructure thermal expansion
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- Molitor F, Güttinger J, Stampfer C, et al. Electronic properties of graphene nanostructures. Journal of Physics: Condensed Matter, 2011, 23(24): 243201Google Scholar
- Ovid’ko I A. Review on grain boundaries in graphene. Curved poly- and nanocrystalline graphene structures as new carbon allotropes. Reviews on Advanced Materials Science, 2012, 30(3): 201–224Google Scholar
- Saboori A, Pavese M, Badini C, et al. Acta Metallurgica Sinica (English Letters), 2017 (in press)Google Scholar
- Koltsova T, Nasibulina L I, Anoshkin I V, et al. New hybrid copper composite materials based on carbon nanostructures. Journal of Materials Science and Engineering B, 2012, 2(4): 240–246Google Scholar
- Kim Y, Lee J, Yeom M S, et al. Strengthening effect of singleatomic- layer graphene in metal–graphene nanolayered composites. Nature Communications, 2013, 4: 2114Google Scholar
- Kwon H, Kawasaki A. In: Attaf B, ed. Advances in Composite Materials for Medicine and Nanotechnology. InTech,2011, 429–444Google Scholar
- Kovácik J, Emmer Š. Thermal expansion of Cu/graphite composites: effect of copper coating. Kovove Materialy, 2011, 49(6): 411–416Google Scholar