Influence of Temperature and Pressure on Mechanical Properties of CNTs-Reinforced Aluminum Nano-composites Fabricated by Double-Pressing Double-Sintering Method

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.

Keywords:

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