Dresden 2009 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 34: Liquid and Amorphous Metals I

MM 34.4: Talk

Wednesday, March 25, 2009, 15:30–15:45, IFW D

Density, surface tension and viscosity of ternary CuCoNi alloys — •Michael Schick, Jürgen Brillo, and Ivan Egry — Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt, 51170 Köln, Germany

We selected the ternary system CuCoNi, which is a good candidate for improving the Giant Magneto Resistance (GMR) of conventional CuCo alloys, for investigation of thermophysical properties.

The latter play an important role in the numerical simulation of processing steps, e.g. casting processes. Along two perpendicular cuts through the ternary phase diagram, surface tension, density and viscosity have been determined as functions of temperature.

For surface tension and density measurements the well established electromagnetic levitation technique was used, which allows a containerless processing of the samples and therefore deep undercooling. Viscosities have been measured in our high temperature oscillating cup viscometer.