Phase-field modelling of pores in ceramic materials

Julia Kundin, Ruhr-Universit├Ąt Bochum, Bochum, Germany

In this work, we develop an efficient phase-field approach to simulate the grain growth in polycrystalline ceramic materials in the presence of pores. The multiphase-field model is coupled to the Cahn-Hilliard equation for pore dynamic that ensures the constant volume of the system. The parameters of the model allow to reproduce the equilibrium dihedral angle in the triple junction of a pore or a particle and a grain boundary. A drag velocity of the grain boundary in the presence of pores or precipitates was also measured for various diffusion coefficients and grain boundary mobilities. The effects of the pore dynamics on the grain size evolution whether pore-controlled or boundary controlled is studied quantitatively.

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Session W1: Wednesday, 27 June 2018

Start: 10:15 a.m.
End: 10:30 a.m.