Consolidation of the Cu46Zr42Al7Y5 amorphous ribbons and powder alloy by hot extrusion

Materials Research

Ana Karla Melle²  Mauricio Mhirdaui Peres¹  Claudemiro Bolfarini²  Walter José Botta²  Alberto Moreira Jorge Junior²  Claudio Shyinti Kiminami² 

[1] ,Federal University of São Carlos Department of Materials Engineering Science and Materials Engineering Post Graduation ProgramSão Carlos SP ,Brazil

关键词: amorphous copper alloys;    hot extrusion;    metallic glass;   

DOI  :  10.1590/S1516-14392012005000095

来源: SciELO

【 摘 要 】

The amorphous Cu46Zr42Al7Y5 alloy presents large supercooled liquid region (ΔT X = 100 K), with a viscosity of about 10(6) N.s/m² 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 Tg and Tx, 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 ΔT X observed after deformation by milling and during extrusion.

【 授权许可】

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