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Coupled phase-field and phase-field crystal studies to bridge the atomic to micro-scale in heterogenous nucleation

Subject Area Materials Science
Term from 2009 to 2015
Project identifier Deutsche Forschungsgemeinschaft (DFG) - Project number 153028148
 
Final Report Year 2014

Final Report Abstract

The main goal of this project was to contribute to a more comprehensive understanding of the kinetics of heterogeneous nucleation and successive initial microstructure evolution as they are determined jointly by mechanisms at the atomic scale and long range contributions as well as the question, to what detail the mechanisms that can be identified in colloids truly carry over to metallic alloy systems. To that end a combined phase-field crystal-phase-field approach has been developed to investigate these issues. It is employed to derive new scaling relations between the system's driving force, the nucleation rate, the mismatch between the nucleating phase and related contact angles in close cooperation with the other theoretical groups of the SPP1296. In the final phase of the priority program the focus was on the technical development and application of the model to study fundamental concepts of nucleation kinetics beyond classical nucleation theories.

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