Phase field modeling of pore electromigration in anisotropic conducting polycrystals

Zachary J. Morgan; Yongmei M. Jin

doi:10.1016/j.commatsci.2019.109362

Phase field modeling of pore electromigration in anisotropic conducting polycrystals

Zachary J. Morgan, Yongmei M. Jin

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

A phase field model is developed to investigate the migration of pores driven by an electric field in polycrystalline materials with anisotropic electrical conductivity. Mass diffusion describing pore migration is coupled with charge conduction by solving microscopic Ohm's law. The model accounts for grain structure dependent conductivity distribution which affects pore migration velocity and path. As an example, the model is applied to simulate pore migration in tin polycrystals. Significant effects of the grain orientation on pore migration is observed which are analyzed in terms of the orientation-dependent conductivity in individual grains and the mismatch of conductivity across grain boundaries. The effects of conductivity anisotropy on the interactions between pores and pore coalescence are also discussed.

Original language	English
Article number	109362
Journal	Computational Materials Science
Volume	172
DOIs	https://doi.org/10.1016/j.commatsci.2019.109362
State	Published - Feb 1 2020
Externally published	Yes

Funding

Funding from NSF under Grant Nos. CMMI-1462204 and DGE-1546592 is gratefully acknowledged. Simulations were performed on the Extreme Science and Engineering Discovery Environment (XSEDE) supercomputers. Funding from NSF under Grant Nos. CMMI-1462204 and DGE-1546592 is gratefully acknowledged. Simulations were performed on the Extreme Science and Engineering Discovery Environment (XSEDE) supercomputers.

Funders	Funder number
National Science Foundation	DGE-1546592, CMMI-1462204
National Sleep Foundation

Keywords

Anisotropic properties
Electromigration
Phase field model
Pore evolution

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10.1016/j.commatsci.2019.109362

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title = "Phase field modeling of pore electromigration in anisotropic conducting polycrystals",

abstract = "A phase field model is developed to investigate the migration of pores driven by an electric field in polycrystalline materials with anisotropic electrical conductivity. Mass diffusion describing pore migration is coupled with charge conduction by solving microscopic Ohm's law. The model accounts for grain structure dependent conductivity distribution which affects pore migration velocity and path. As an example, the model is applied to simulate pore migration in tin polycrystals. Significant effects of the grain orientation on pore migration is observed which are analyzed in terms of the orientation-dependent conductivity in individual grains and the mismatch of conductivity across grain boundaries. The effects of conductivity anisotropy on the interactions between pores and pore coalescence are also discussed.",

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AU - Jin, Yongmei M.

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N2 - A phase field model is developed to investigate the migration of pores driven by an electric field in polycrystalline materials with anisotropic electrical conductivity. Mass diffusion describing pore migration is coupled with charge conduction by solving microscopic Ohm's law. The model accounts for grain structure dependent conductivity distribution which affects pore migration velocity and path. As an example, the model is applied to simulate pore migration in tin polycrystals. Significant effects of the grain orientation on pore migration is observed which are analyzed in terms of the orientation-dependent conductivity in individual grains and the mismatch of conductivity across grain boundaries. The effects of conductivity anisotropy on the interactions between pores and pore coalescence are also discussed.

AB - A phase field model is developed to investigate the migration of pores driven by an electric field in polycrystalline materials with anisotropic electrical conductivity. Mass diffusion describing pore migration is coupled with charge conduction by solving microscopic Ohm's law. The model accounts for grain structure dependent conductivity distribution which affects pore migration velocity and path. As an example, the model is applied to simulate pore migration in tin polycrystals. Significant effects of the grain orientation on pore migration is observed which are analyzed in terms of the orientation-dependent conductivity in individual grains and the mismatch of conductivity across grain boundaries. The effects of conductivity anisotropy on the interactions between pores and pore coalescence are also discussed.

KW - Anisotropic properties

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KW - Phase field model

KW - Pore evolution

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JO - Computational Materials Science

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ER -

Phase field modeling of pore electromigration in anisotropic conducting polycrystals

Abstract

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Keywords

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