Analysis of the elastic strain energy driving force for grain boundary migration using phase field simulation

2010 ◽  
Vol 63 (11) ◽  
pp. 1049-1052 ◽  
Author(s):  
Michael Tonks ◽  
Paul Millett ◽  
Wei Cai ◽  
Dieter Wolf
Keyword(s):  
Grain Boundary ◽  
Phase Field ◽  
Driving Force ◽  
Elastic Strain ◽  
Strain Energy ◽  
Boundary Migration ◽  
Elastic Strain Energy ◽  
Grain Boundary Migration ◽  
Phase Field Simulation ◽  
Field Simulation

Influence of Crystallographic Orientation, Chemical Inhomogeneities, Material Transport Anisotropy and Elastic Strain Energy on the Migration of Grain Boundaries in Chromium-Doped Alumina During Internal Reduction

1994 ◽  
Vol 357 ◽  
Author(s):  
Monika Backhaus-Ricoult ◽  
A. Peyrot-Chabrol ◽  
R. Chiron ◽  
S. Hagege
Keyword(s):  
Grain Boundary ◽  
Grain Boundaries ◽  
Elastic Strain ◽  
Strain Energy ◽  
Chemical Potential ◽  
Boundary Migration ◽  
Elastic Strain Energy ◽  
Lattice Diffusion ◽  
Boundary Plane ◽  
Material Transport

AbstractDiffusion-induced grain boundary migration is observed during internal reduction of chromium-doped alumina. It occurs because grain boundary diffusion is fast compared to lattice diffusion of oxygen. The oxygen chemical potential relaxes between grain boundaries and adjacent grains. Migration to either side of the boundary is controlled by multiple factors: chemical composition differences between adjacent grains, elastic strain energy differences on the two sides of the boundary plane or by more rapid oxygen relaxation when the c-axis of a grain is perpendicular to the boundary plane.

scholarly journals Creating polar antivortex in PbTiO3/SrTiO3 superlattice

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Adeel Y. Abid ◽  
Yuanwei Sun ◽  
Xu Hou ◽  
Congbing Tan ◽  
Xiangli Zhong ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Phase Field ◽  
Driving Force ◽  
Topological Phase ◽  
Phase Field Simulation ◽  
Topological Structures ◽  
Field Simulation ◽  
Condensed Matters ◽  
Topological Phase Transitions ◽  
Insight Into

AbstractNontrivial topological structures offer a rich playground in condensed matters and promise alternative device configurations for post-Moore electronics. While recently a number of polar topologies have been discovered in confined ferroelectric PbTiO3 within artificially engineered PbTiO3/SrTiO3 superlattices, little attention was paid to possible topological polar structures in SrTiO3. Here we successfully create previously unrealized polar antivortices within the SrTiO3 of PbTiO3/SrTiO3 superlattices, accomplished by carefully engineering their thicknesses guided by phase-field simulation. Field- and thermal-induced Kosterlitz–Thouless-like topological phase transitions have also been demonstrated, and it was discovered that the driving force for antivortex formation is electrostatic instead of elastic. This work completes an important missing link in polar topologies, expands the reaches of topological structures, and offers insight into searching and manipulating polar textures.

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