The preparation of Al O –Cu composite by internal oxidation

The internal oxidation technique had been used successfully in manufacturing Al2O3 particle reinforced copper matrix composites. The microstructure of the composites was studied using scanning electron microscope. Aluminum and oxygen content in the specimens were detected by energy dispersive X-ray analysis. The structure of the phases formed was determined by X-ray diffractometer. Experimental results show that the internal oxidation process generates very fine and well dispersed alumina particles in the surface layers of the copper matrix, and that the number of the alumina particles is increased with the increase in aluminum content in matrix, and it also effects the specific resistance and wear rate of the prepared copper matrix composites. q1998 Elsevier Science B.V. All rights reserved