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Vortex casting is one of the simplest methods of producing metal matrix   composites (MMCs). However, this simple method does have some drawbacks,   which reduce the mechanical properties of the produced composites. In this   study, we tried to modify the process of composite production before, during,   and after the casting procedure. Low-cost Al2O3-TiB2 ceramic composite   particles, which produced after combustion synthesis, were used as   reinforcement. These powders, which are thermodynamically stable with molten   aluminum below 900°C, were mixed with aluminum and magnesium powders before   casting using ball milling and the mixed powders were injected into the   molten metal (pure Al). This process was applied to enhance the wettability   of ceramic particles with molten aluminum. After casting, warm equal channel   angular pressing (ECAP) and hot extrusion processes were applied to   investigate their effects on the mechanical properties of the final   composites. It was revealed that both warm ECAP and hot extrusion have a   strong influence on increasing the mechanical properties mainly due to   decreasing the amount of porosities

Fabrication of Al-based composites reinforced with Al2O3-Tib2 ceramic composite particulates using vortex-casting method