Publications
Phase-field modeling of pores and precipitates in polycrystalline systems
J. Kundin, R. Schiedung, H. Sohaib, I. Steinbach.
Modelling and Simulation in Materials Science and Engineering, 26, 065003, (2018)
Abstract
In this work, we develop an efficient phase-field approach to simulate the grain
growth in polycrystalline ceramic materials in the presence of pores with
various mobilities and diffusion coefficients. The multi-phase-field model is
coupled to the Cahn–Hilliard equation for pore dynamics by interaction
functions which describe the interaction of pores with grain boundaries. Two
types of the model are suggested with one and two order parameters
responsible for the pores. We also show that the model can be applied to the
simulation of the interaction of the grain boundaries with coherent and non-
coherent particles. The parameters of the model allow us 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 in ceramic materials was investigated and compared with reported
theoretical predictions and experimental data.
Keyword(s): grain growth; phase-field modeling; porosity
DOI: 10.1088/1361-651X/aacb94
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