A Simulation of Ferroelastic Phase Formation by Using Phase Field Model

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Abstract:

In order to incorporate the mechanical behavior of ferroelastic phase into the stress analysis of solid oxide fuel cell in consideration of elastic, creep, thermal and reduction strains, we propose a mathematical model to predict the formation of ferroelastic phases in crystal grains of La0.6Sr0.4Co0.2Fe0.8O3-δ. The phase field model equipped with the elastic energy is introduced to realize the morphology formation of ferroelastic phases in a crystal grain. By the use of the developed mathematical model, some numerical examples are performed to reproduce the deformation-induced nucleation and growth of ferroelastic phases of La0.6Sr0.4Co0.2Fe0.8O3-δ.

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208-213

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December 2016

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© 2017 Trans Tech Publications Ltd. All Rights Reserved

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[1] R. O'Hayre, S. -W. Cha, W. Colella, F.B. Prinz , Fuel Cell Fundamentals, second ed., John Wiley & Sons, New York, (2009).

Google Scholar

[2] Y. Kimura, J. Tolchard, M., A. Einarsrud, T. Grande, K. Amezawa, S. Hashimoto, T. Kawada, The Effect of Ferroelasticity of La1-xSrxCo1-yFeyO3-δ on the Mechanical Stability of Solid Oxide Fuel Cells, ECS Trans. 57 (2013) 635-642.

DOI: 10.1149/05701.0635ecst

Google Scholar

[3] M. Muramatsu, K. Terada, T. Kawada, K. Yashiro, K. Takahashi and S. Takase, Characterization of time-varying macroscopic electro-chemo-mechanical behavior of SOFC subjected to Ni-sintering in cermet microstructures, Comput. Mech. 56 (2015).

DOI: 10.1007/s00466-015-1193-7

Google Scholar

[4] K. Amezawa, K. Sato, T. Hashida, T. Kawada, In Situ Measurements of Mechanical Properties of Materials for Solid Oxide Fuel Cells, Netsu Sokutei. 40 (2013) 23-29.

Google Scholar

[5] Arlt, G., Twinning in ferroelectric and ferroelastic ceramics: stress relief. J. Mater. Sci., 262 (1999) 438-443.

Google Scholar

[6] Kimura, Y. et al.: Ferroelastic Domain Reorientations and Its Influence on Mechanical Properties of La 0. 6Sr0. 4Co0. 2Fe0. 8O3-d, J. Electrochem. Soc., 161 (2014) F3079-F3083.

DOI: 10.1149/2.0131411jes

Google Scholar

[7] Yamanaka, A. et al., Elastoplastic Phase-field Simulation of Self- and Plastic Accommodations in Cubic → Tetragonal Martensitic Transformation, Mater. Sci. Eng., A 491 (2008) 378-384.

DOI: 10.1016/j.msea.2008.02.035

Google Scholar

[8] Hall, D.A. et al.: Analysis of elastic strain and crystallographic texture in poled rhombohedral PZT ceramics, Acta Mater. 54 (2006) 3075–3083.

DOI: 10.1016/j.actamat.2006.02.043

Google Scholar