Investigation of Viscosity Measurements of Molten Cu-Zr-Al Alloys

Abstract:

Viscosity reflects kinetic behaviors of metallic glass liquids, as well as the changes of structures of liquids with temperature. In the present work, the viscosity of superheated Cu-Zr-Al alloys has been detected by a torsional oscillating viscometer, and the experimental parameters have been explored. The experimental results indicate that Cu-Zr-Al alloys react with corundum crucibles and are not oxidated easily in the viscometer. In addition, the influence of thermal history on viscosity measurements is not inconsiderable. By eliminating the above factors, an abnormal three-stage trend of viscosity changes is observed finally. Analysis shows that this abnormal dynamic phenomenon probably is attributed to the transition of clusters in different temperature ranges of the glass liquids, and might correspond to the abnormal thermodynamic behavior observed in Cu-Zr-Al liquids.

• Periodical: Materials Science Forum (Volumes 745-746)
• Pages: 781-787
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.745-746.781
• Online since: February 2013
• Authors: Chao Zhou, Li Na Hu
• Keywords: Cu-Zr-Al, Interfering Factor, Three-Stage Trend, Viscosity

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