Consolidation of the Cu46Zr42Al7Y5 Amorphous Ribbons and Powder Alloy by Hot Extrusion

The amorphous Cu46Zr42Al7Y5 alloy presents large supercooled liquid region (Delta T-X = 100 K), with a viscosity of about 10(6) N.s/m(2) where the material can flow as a liquid, making it possible an easy deformation in this temperature region. The aim of this work was to analyze processing routes to produce bulks of metallic glasses. Two kinds of materials were used: amorphous powders and ribbons, both were consolidated by hot extrusion in temperatures inside the range between T-g and T-x, with a ram speed of 1 mm/min and extrusion ratio of 3 : 1. Analysis of X-Ray Diffratometry (XRD), Differential Scanning Calorimetry (DSC) and Scanning Electron Microscopy (SEM), revealed that the proposed consolidation routes were effective to produce large bulks of amorphous materials, even with the strong decreasing of Delta T-X observed after deformation by milling and during extrusion.