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In this world, the development of composite materials as well as the related design and manufacturing technologies is one of the most important advances in the history of materials. Composites are combination of materials having mechanical and physical properties which can be tailored to meet the requirements of a particular application. Many composites also exhibit great resistance to wear, corrosion, and greater heat dissipation capacity. These unique characteristics provide the mechanical engineer with design opportunities not possible with conventional monolithic materials. MMCs are important materials which are now used widely, not only in the aerospace industry, but also in a large and increasing number of mechanical engineering applications, such as internal combustion engines; machine components; automobile, train, and aircraft structures and mechanical components, such as brakes, drive shafts, flywheels, tanks. Zinc itself has a greater melting point so as to reduce the heat dissipation in various parts of the heat treatment processes. The reinforcements like the silicon carbide powder in preparation of Zn based MMCs gives material the greater strength, weight reduction property, greater hardness, reduction in cost, improved life of the component.