Copper matrix composites reinforced with nanometer alumina particle

The microstructure and properties of the oxide particle dispersion strength ened composite fabricated by internal oxidation method have been studied. U sing nitrogen base atmosphere and a new process flow we can improve the qua lity of the MMCs and decrease the cost of the composites. The size of alumi na is in the nanometer order of magnitude and the particles are well distri buted. Under the condition of having good electrical conductivity, the comp osites have 1 to 2 times higher mechanical properties than those of pure Cu .