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MM: Fachverband Metall- und Materialphysik

MM 61: Liquid and Amorphous Metals V - Structure and structure formation

MM 61.6: Vortrag

Donnerstag, 3. April 2014, 17:00–17:15, IFW A

Surface tension of liquid Al-Au alloys — •Gerhard Kolland and Jürgen Brillo — Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt, Köln, Germany

Wire bonding of gold with conducting substrates such as aluminum is a widely used industrial technique. To understand the formation of the Al-Au interface, it is crucial to study the thermophysical properties of the binary Al-Au system in the liquid state. We measured the surface tension of liquid Al-Au alloys in a wide temperature and concentration range. The measurements have been performed containerlessly by electromagnetic levitation using the oscillating-drop technique. We compare the obtained experimental data with theoretical predictions from the Butler- and multilayer model.