Dresden 2009 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 35: Poster Session II

MM 35.28: Poster

Mittwoch, 25. März 2009, 16:30–18:30, P4

Simulation of phase diagrams of nanoscale particles — •Michael Gährken, Harald Rösner, and Gerhard Wilde — Institut für Materialphysik, Universität Münster, Wilhelm-Klemm-Str. 10, 48149

The phase diagram of nano-sized binary particles changes compared to macroscopic particles. A theoretical model, based solely on the thermodynamic contribution of the inner phase boundery, was already developed for a simple eutectic system and has been modified for systems with limited solid solubility.

The simple eutectic system's thermodynamic properties follow basically an ideal solution behavior in both the liquid and the solid phase, whereas the solid solubility was introduced by a regular solution behavior in the solid phase.

In addition to theoretical analyses, experimental investigations were conducted on binary Sn-Bi nanoparticles that were embedded in an Al matrix. The obtained results from calorimetry measurements are critically discussed in view of the comparison between experiments and idealized model behavior.