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

作者：Duarte Isabel^*; Ventura Eduardo; Olhero Susana; Ferreira Jose M F

来源：Materials Letters, 2015, 160: 162-166.

DOI：10.1016/j.matlet.2015.07.115

• Aluminium foams
• Carbon nanotubes
• Reinforced closed-cell foams
• Nanocomposite metal foams
• Colloidal processing
• Powder metallurgy

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%.

• 出版日期2015-12-1