Abstract
Cu was strengthened by Al 2O 3-nanoparticles using powder-metallurgical technique. The Al 2O 3-nanoparticles were generated by Nd:YAG-laser ablation of corundum followed by condensation of the induced vapor in a defined atmosphere and had a median particle diameter of 14 nm. In order to distribute the nanoparticles in the Cu-matrix, Cu-micropowder with a median particle diameter of about 20 μm was mixed or ball milled with 3 Vol.% of the nanoscaled ceramic powder followed by hot extrusion. The mechanical properties of the composites were investigated by tensile tests and hardness measurement and the microstructure was examined by light, scanning electron, and transmission electron microscopy.
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