Features of Preparing Composite Granules of Aluminum Foam Reinforced with Carbon Nanotubes

The qualitative characteristics of aluminum-foam granules prepared from aluminum powder reinforced with carbon nanotubes are discussed. Heat treatment at 700-800°C for 4-5 min is found to be sufficient for foaming of preforms to achieve the best density and microhardness parameters of the samples. The structures of test samples are investigated. The mechanical properties and pore distribution in their volume are evaluated. Carbon nanotubes are shown to have a strengthening effect and to affect the pore-forming process, ensuring a uniform pore distribution and accelerating the foaming.