Aluminum matrix composites (AMC) reinforced with ceramic nanoparticles are widely used in different industries such as military, automobile manufacturing and aerospace due to their unique mechanical and physical properties up to now, nanosilica has not been used as reinforcement in Al-AMC macro-composite sheets so far. In this study, Al-AMC-Al strip was synthesized and characterized. The composite was manufactured by compaction of the Al-nanosilica composite powder between commercial pure aluminum sheets followed by sintering and hot rolling. Effects of the reinforcement content, sintering condition, surface pattern of the Al sheets and hot rolling process on the structure and mechanical properties of the samples were examined. Microstructural investigations, particularly interface of the layers was studied using optical microscope. It was revealed that the interlayer bonding occured only when an appropriate pattern was mechanically applied on the surface of the sheets before compaction. The mechanical properties of the hot rolled macro-composite were investigated by tensile test at room temperature. The results showed that adding 1% the nanosilica powder to aluminum matrix improved the mechanical properties compared to the reference sample. The tensile strength increased about 29%; in cost of a decrease in ductility. The hot rolling process eliminated the nanocomposite porosities and improved interlayer bonding. . Keywords: Macro-composite, Nanoparticle , Hot rolling, Tensile strength.
