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Composite materials are generally made up of two constituents-matrix and reinforcement. The matrix material is stable and provides support to the reinforcement material. A variety of moulding methods can be used to prepare composites based on the type of application. The objective of manufacturing a new composite material is to improve the mechanical properties such as strength, stiffness, toughness and high temperature performance. The size of the reinforcement determines its potential of contributing its properties to the composite. As magnesium is being the one of the most abundant and lightest of all metals, it can be the best replacement for the material used in aerospace and automotive industry as composite material. Wear characteristic of magnesium is poor, but wear resistant is an important property for the industrial metals. As graphite is being soft and lubricant material, it is mixed in the proportion of 5%, 10%, and 15% with magnesium, processed by powder metallurgy technique, then extruded and machined to conduct pin-on-disc test by Taguchi L9 orthogonal array design. Wear test is carried out on Standard C45 steel disc; wear loss and coefficient of friction are observed during the test. Grey Relational Analysis is used to optimize the wear reducing parameters and Analysis of Variance is performed to identify the significance of the parameters.

Optimization of Sliding Wear Parameters for Mg/Grp Composites by Grey Relational Analysis