The emergence of metal matrix composites is partly a consequence of an improved understanding of their potentials and limitations based on their science of process, principles of physical metallurgy and interfacial chemistry. They can be produced by conventional casting techniques. The reinforcing material such as particulates of graphite can be added into the melt of any metal during its stirring. The resultant mixture is then cast into a permanent mould. This technique was used to produce aluminum-graphite composite containing different percentage concentrations of graphite ranging from zero to twenty (0-20%wt). To solve the problem of making the molten aluminum alloy wetting the graphite, a special chemical activation was carried out. The accent is on mechanical performance, describing how the presence of reinforcement in a metallic matrix influences its mechanical and physical properties. This composite shows a decrease in wear rate due to the presence of graphite (fiber)in the composite.
Metal, Matrix, Composites, Aluminum, Graphite and Concentration
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