ANALYSIS OF MECHANICAL CHARACTERISTICS FOR COPPER-ALUMINA COMPOSITES

Abstract

Automobiles are using heavy materials which reduce the mechanical efficiency, thermal efficiency and fuel Consumption is increasing vice versa. In our point of view all these drawbacks can be over come by replacing composite materials instead of heavy metals in manufacturing. High specific stiffness and near-zero coefficient of thermal expansion is being experienced in Metal Matrix Composites (MMC’S).These are a new class of materials that combine two or more separate components into a form suitable for structural applications. While each component retains its identity, the new composite material displays macroscopic properties superior to its parent constituents, particularly in terms of mechanical properties and economic value.
Alumina (Al2O3) possesses favorable physical and chemical properties such as high strength, hardness, elastic modulus and excellent resistance to thermal and chemical environments. However, its applications are somewhat limited because of poor toughness and inferior thermal resistance.On the other hand, most structural ceramics present poor electrical conductivity. It has been reported that the incorporation of some amounts of small-size metal particles into an Al2O3matrix, as in the case of Al2O3,Cu (90%-10%) , Al2O3,Cu (80%-20%) and Al2O3,Cu (70%-30%) composites, can significantly improve both the toughness and electrical properties.Using an intense mixture of Al2O3 with different copper contents(10,20 or30mass %) several Al2O3-Cu composite materials were fabricated. The microstructure of the composites was observed by optical microscope. This result is analysis by destructive testing process.

Author

Y.Stanley