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Lecture

Phase-field simulation of the effects of system and process parameters on rotational solidification in the ternary eutectic Bi-In-Sn system



In order to understand the effects of the system and process parameters on the microstructure adjustment of the solidifying materials, simulation studies of the rotational solidification can give new insights. These simulations make the possibility of studying various growth velocities within the same experiment. Meanwhile extraction of the Wulf shapes leads to the deeper understanding of the influences of the anisotropy of the interfacial energies on the pattern formation.


2D experimental databases for the ternary eutectic Bi-In-Sn system are available in the literature. These databases consists of the directional [1,2] and rotational [3] solidification studies. In this work, a phase-field model is utilized to simulate the experimental setup of the rotating disk. The Gibbs energies are approximated using the CALPHAD database of the system and the chemical potentials of the involving phases as well as the driving forces of the solidification processes are derived based on these approximation. The microstructure with ABAC repeat unit is achieved and the effects of the different system and process parameters like the anisotropy of the interfacial energies, and the solidification velocities on the pattern formation is discussed. Good correlation with the reported experimental results is achieved indicating the applicability of the method.

 

Speaker:
Kaveh Dargahi Noubary
Karlsruhe Institute of Technology (KIT)
Additional Authors:
  • Michael Kellner
    Karlsruhe Institute for technology (KIT)
  • Dr. Johannes Hötzer
    Karlsruhe Institute for Technology (KIT)
  • Prof. Dr. Britta Nestler
    Karlsruhe Institute for Technology (KIT)