Effect of addition of nano Magnesuim oxide on the mechanical properties of Alumina/ Silicon Carbides nano composites synthesized by mechanical alloying

Abstract The purpose of this study, Alumina and Silicon carbide-based nano-composite processing is due to the special properties and wide applications of these nano-composites have attracted much attention in various industries. In this paper, the mechanical properties of Al2O3 -4.1% wt SiC nanocomposites sintered without pressure by adding a weight percent of nano-MgO has been studied .Nano powders of ?-Al2O3,?-SiC and MgO were used as starting materials in this study .At First, a certain amount of nano-powders Al2O3 - SiC for the first sample and Al2O3 - SiC-MgO for a second sample to powder ratio of 20 to 1 by a planetary ball mill for 4 h speed 250 RPM mixture and the resulting powder Mesh 150 Mu passes and was calcined at 600 C ?. The effect of MgO nano powder obtained samples for mechanical properties of nano-composites, Al2O3 - SiC were tested for hardness.