Investigation on the Cu-Cr-RE alloys by rapid solidification

The paper presents a process where Cu-Cr-RE alloys are produced by rapid so lidification powder metallurgy, composite green compact, extrusion and sing ing. The lattice parameter of the copper-rich solid solution in powders is determined by X-ray diffraction. A significant increase in the extension of the solid solubility of chromium and rare-earth in copper is achieved with this process. The microstructures of the alloys are examined by transmissi on electron microscopy. Hardness and tensile properties are evaluated. The strengthening mechanism of alloys includes line grain, dispersion and preci pitation strengthening. The electrical conductivity is higher than the conv entional Cu-Cr and Cu-Al2O3 alloys. Published by Elsevier Science B.V.