The Processing Methods and Properties of Aluminium-SiCp Metal Matrix Composites Produced by Stir Casting for Marine Applications - A Review

Composite material is made up of at least two distinct materials functioning together to provide material properties that are different and unique to their own, with quality superior than its constituents. Generally, metal matrix composite materials consist of a matrix (bulk material) and a reinforcement of some type, which are combined primarily to enhance the strength and stiffness of the matrix. Metal matrix composites combine the metallic properties of matrix alloys with the ceramic properties of reinforcements, to develop materials with greater strength capabilities. They are materials that are attractive and suitable for a large variety of engineering applications. This work reviews the effects of silicon carbide particulate reinforcements on aluminium metal matrix composites for marine and underwater applications, with specific emphasizes on improved mechanical, structural and corrosion properties. In this paper, specific reference was given to stir casting techniques as a liquid state metal manufacturing method of aluminium metal matrix composites. The work revealed that silicon carbide significantly enhances the overall mechanical and tribological strength of the composite along with corrosion resistance. It was revealed that research efforts have mostly been focused on the mechanical, physical and thermo-mechanical characteristics of the composites, more recourse to their corrosion characteristics is very significant in evaluating its application potential as marine structural materials.