resumo
This manuscript reports on the fabrication of closed-cell aluminium alloy foams reinforced with carbon nanotubes (CNTs) through a novel approach that combines the powder metallurgy method with colloidal processing step that grants uniform dispersion of CNTs into the aqueous suspension of all powder components. Spraying the as prepared suspension into liquid nitrogen followed by lyophilisation enables obtaining homogeneous spherical granules to be used in the powder metallurgy method. Besides ensuring good dispersion of all powder components in the system, the non-agglomerated form of CNTs and the expansion upon foaming foster their structural integrity under stretched conditions in the final foams for an efficient load transfer. (C) 2016 Portuguese Society of Materials (SPM). Published by Elsevier Espana, S.L.U. All rights reserved.
palavras-chave
METAL-MATRIX COMPOSITES; COMPRESSIVE PROPERTIES; BENDING BEHAVIOR; ALLOY FOAMS; TUBES; ADDITIONS; STRENGTH
categoria
Materials Science
autores
Duarte, I; Ventura, E; Olhero, S; Ferreira, JMF
nossos autores
José Maria da Fonte Ferreira
Professor(a) Jubilado(a)
Susana Maria Henriques Olhero
Professor Auxiliaragradecimentos
This work was supported by TEMA (Cooperation Project, CC/ID/CS/2.30.400.20.12, www.ua.pt/tema). This work was also supported 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).