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.

Development of Al- and Cu-based nanocomposites reinforced by graphene nanoplatelets: Fabrication and characterization / Saboori, Abdollah; Pavese, Matteo; Badini, CLAUDIO FRANCESCO; Fino, Paolo. - In: FRONTIERS OF MATERIALS SCIENCE. - ISSN 2095-0268. - (2017), pp. 1-11. [10.1007/s11706-017-0377-9]

Development of Al- and Cu-based nanocomposites reinforced by graphene nanoplatelets: Fabrication and characterization

SABOORI, ABDOLLAH;PAVESE, MATTEO;BADINI, CLAUDIO FRANCESCO;FINO, Paolo
2017

Abstract

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.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2670415
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