A novel approach to prepare aluminium-alloy foams reinforced by carbon-nanotubes


This paper presents an innovative approach to prepare a new class of closed-cell reinforced (nanocomposite) metal-foams that synergistically explores the remarkable properties of both metal-foams and carbon-nanotubes. This approach combines colloidal-processing (including freeze-granulation-lyophilisation) and powder technology, ensuring the retention of the tubular-structure of -COOH-functionalised multiwall carbon nanotubes (MWCNTs-COOH) and their uniform distribution in the metal-matrix. The microstructural analysis revealed non-agglomerated, well-dispersed, stretched and directionally-aligned MWCNTs within the AI-matrix of the foams. These conditions potentiate the reinforcing role of MWCNTs with Vickers microhardness increments > 100%. (C) 2015 Elsevier B.V. All rights reserved.




Materials Science; Physics


Duarte, I; Ventura, E; Olhero, S; Ferreira, JMF

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This work was supported by TEMA (Centre for Mechanical Technology and Automation, www.ua.pt/tema < http://www.ua.pt/tema >) through the cost center CC/ID/CS/2.30.400.20.12; and by the European Regional Development Fund (FEDER) under the PT2020 Partnership Agreement through the COMPETE, by the Portuguese Government through the Portuguese Foundation for Science and Technology (FCT), in the scope of the projects UID/CTM/50011/2013 (Aveiro Institute of Materials, CICECO, www.ciceco.ua.pt < http://www.ciceco.ua.pt >).

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