Berlin 2018 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 26: Microstructure and Phase Transformations

MM 26.3: Vortrag

Dienstag, 13. März 2018, 12:15–12:30, TC 010

Study of the nucleation behavior and solid-liquid interfacial energy of pure metals — •Manoel da Silva Pinto, Martin Peterlechner, and Gerhard Wilde — Institute of Material Physics, Münster, Germany

We examine the liquid-solid transformation of selected pure metals and Germanium. The solid-liquid interfacial energy is of special interest due to its importance in the solidification process and other metallurgical phenomena. Various models suggest a correlation of this energy with bulk properties, e.g. the heat of fusion, which presents a more easily accessible quantity. Yet, so far experimental data of sufficient accuracy that allow for quantitative comparison with the model predictions are missing. In this work, data sets of the undercooling of Gold, Nickel, Copper, Cobalt and Germanium were acquired through calorimetric measurements. For statistical significance, datasets in the range of 100 to 1000 crystallization events were recorded for each material. The statistical analyses of these data yield a quantitative description of nucleation kinetics. The data also yield the solid-liquid interface energy and allows comparing the experimental results with theoretical predictions.