A Yarahmadi - MSc. Student of Metallurgy and Materials Engineering Department, Engineering and Technology faculty, Imam Khomeini International University (IKIU), Qazvin, Iran
M Rajabi - Academic Member at Metallurgy and Materials Engineering Department, Engineering and Technology Faculty, Imam Khomeini International University (IKIU), Qazvin, Iran.
M.T Noghani - Academic Member at Metallurgy and Materials Engineering Department, Engineering and Technology Faculty, Imam Khomeini International University (IKIU), Qazvin, Iran.
R Taghiabadi - Academic Member at Metallurgy and Materials Engineering Department, Engineering and Technology Faculty, Imam Khomeini International University (IKIU), Qazvin, Iran

Multi-walled carbon nanotubes (MWCNTs) should be attractive for the reinforcement of metal-matrix composites, because of their high strength, high modulus and high thermal conductivity. The effects of CNTs content, temperature, pressure and secondary pressing-sintering on mechanical properties of the nano-composites were investigated. To improve density as well as mechanical properties, the double-pressing double-sintering technique was used, as increments of 2.4 to 16.14% of densification was obtained when compared with the nano-composites produced by conventional sintering route. In this study, the optimum CNTs content, temperature and pressure have been determined for the manufacture of Al-CNTs nano-composites. SEM and XRD have been used to study morphology, sintering procedure and various phases produced during synthesis of the Al-CNTs nano-composites.

Aluminum-CNTs Nano-composites; optimum density; influence of temperature and pressure; double-pressing double-sintering method; mechanical properties