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MM: Fachverband Metall- und Materialphysik

MM 12: Postersitzung I

MM 12.8: Poster

Monday, March 14, 2011, 17:30–19:00, P5

Interfacial tension and wetting at the liquid-liquid interface in Al-Bi, Al-In and Al-Pb monotectic alloys — •Ivan Kaban¹, Markus Köhler², Lorenz Ratke², Walter Hoyer³, Norbert Mattern¹, and Jürgen Eckert¹ — ¹IFW Dresden, Institute for Complex Materials, P.O.B. 270116, D-01171 Dresden, Germany — ²Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR), D-51170 Köln, Germany — ³Chemnitz University of Technology, Institute of Physics, D-09107 Chemnitz, Germany

Aluminium alloys with Bi, In or Pb are characterized by a large miscibility gap in the liquid state. They solidify at normal conditions into layered structures, which is the main shortcoming in a view of practical applications. A crucial role in the demixing process is played by the wetting, liquid-liquid interfacial energy and density difference of the coexistent liquid phases. In this contribution we present the results of the experimental investigations of the density, interfacial tension, and wetting of Al2O3, ZrO2 and TiB2 ceramics at the liquid-liquid interface in Al-Bi, Al-In and Al-Pb alloys. The wetting experiments suggest that Al2O3, ZrO2 and TiB2 particles could be used for the nucleation of a minority phase in the Al-In and Al-Pb immiscible alloys.