In situ synthesis of Fe-TiC/Al2O3 hybrid nanocomposite via mechanical activation-assisted combustion reaction of ilmenite-Al-C system

In this research, fabrication of Fe-TiC/Al2O3 nanocomposite from ilmenite-Al-C system was studied using mechanically activated powders. The effects of Al/C molar ratio and heat treatment temperature on synthesized products were investigated. The synthesized nanocomposites were characterized by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Field Emission Scanning Electron Microscopy (FE-SEM) and Raman spectroscopy. The results showed that for the system with Al/C:1/2.5 molar ratio and after ball-milling for 6h, the major formed phases were Fe and TiO2 during heat treatment at 990°C for 3h and the mechanical activation was inefficient. However, for the system with Al/C:2/1 molar ratio not only iron was reduced to some extent during ball milling process, but also the combustion reaction was completed and the Fe-TiC/Al2O3 nanocomposite was fabricated after heat treatment at 990ºC for 3h. The TiC and Al2O3 crystallite sizes were calculated to be 23 and 38 nm, respectively

کلیدواژه ها:

nanocomposite ، mechanical activation ، combustion synthesis ، ilmenite ، aluminium