الفهرس 
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Abstract
To study the factors affect on composite material properties, were studied A220 Aluminum alloy was reinforced with SiC particles having the range 10 µm to 30µm and AI2O3 particles having size range 40µm to 60µm. The Metal Matrix Particle Composites (MMPCs) have been prepared by vortex method. The composites produced contained 7% and 20% weight percentage of both AI2O3 and SiC particles.
Hardness, tensile, fatigue, and wear were carried out to assess the properties of the prepared composites.
The Rockwell (B-scale) tests were carried out to study the hardness of the composites. The results showed that the hardness increase as a result of increasing the %wt. of reinforcement.
The tensile tests for the composites showed that, the addition of the particles increased yield strength and modulus of elasticity but reduced ductility.
Pin on disc dry sliding test is carried out to study the wear rate of the composites. The results showed that the addirion of the particles increased the wear resistance of Metal Matrix Composites (MMCs) compared to the unreinforced alloy, also the resistance to wear of composites are improved by increasing the weight fration of particles.
Scanning election microscopy was used to study the fracture surface of different types of tests carried out in order to investigate the different types of fracture surfaces.