Computational design of microstructures of textured ferroelectric ceramics by phase field simulation

Zhang, Yongmei; Liu, Liangliang

doi:10.1016/j.commatsci.2018.11.051

Cited by 10 publications

(6 citation statements)

References 22 publications

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“…The phase-field model follows that of previous studies. 9,18 The time-dependent Ginzburg-Landau equation for the long-range order can be expressed as 12 d𝜂 𝑖 (𝐫, 𝑡)…”

Section: Experimental Methodsmentioning

confidence: 99%

“…C = 1 for the matrix and 30 for the template. 9 The time scale was represented by the time step (TS). TS = 1 corresponds to one Δ𝑡.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Inside the grain, the following values were assigned to the parameters:

{\eta _i} = \;1,\;{\eta _{j \ne i}} = \;0

, where i is a natural number between 1 and q , which represents the orientation of the grain. The phase‐field model follows that of previous studies 9,18 . The time‐dependent Ginzburg–Landau equation for the long‐range order can be expressed as 12

\begin{equation}\;\frac{{{\rm{d}}{\eta _i}\left( {{\bf{r}},t} \right)}}{{{\rm{d}}t}} = {\rm{\;}} - {L_i}\frac{{{{\delta}}F}}{{{{\delta}}{\eta _i}\left( {{\bf{r}},t} \right)}},\end{equation}

where L i is the mobility of the grain‐boundary migration.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…In our previous studies, 9,10 a relative density of 96% and the Lotgering factor of 0.95 were obtained for textured KSr 2 Nb 5 O 15 (KSN) ceramics using needle‐like particles with an appropriate size distribution as a raw material. Further studies on the chemical composition and grain size effect could be advantageous to the development of high‐performance ferroelectric ceramics, for which a novel technique is essential to control the abnormal grain growth and maintain the grain orientation.…”

Section: Introductionmentioning

confidence: 99%

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Microstructural design of textured KSr₂Nb₅O₁₅ ceramics by a phase‐field simulation and lamination technique

et al. 2022

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The densification of textured ceramics requires a small template size. However, it is challenging to complete the directional arrangement into the matrix by small templates during the templated grain growth. We propose a strategy to increase the density and texture degree of KSr 2 Nb 5 O 15 ceramics. The microstructures can be designed by a phase-field simulation and lamination technique. For the textured KSr 2 Nb 5 O 15 ceramics, a high piezoelectricity of d 33 = 98 pC/N (the highest reported d 33 is 65 pC/N) is achieved by the microstructural control. This study provides a novel technique for preparation of textured piezoelectric ceramics with high performances.

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“…The phase-field model follows that of previous studies. 9,18 The time-dependent Ginzburg-Landau equation for the long-range order can be expressed as 12 d𝜂 𝑖 (𝐫, 𝑡)…”

Section: Experimental Methodsmentioning

confidence: 99%

“…C = 1 for the matrix and 30 for the template. 9 The time scale was represented by the time step (TS). TS = 1 corresponds to one Δ𝑡.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Inside the grain, the following values were assigned to the parameters:

{\eta _i} = \;1,\;{\eta _{j \ne i}} = \;0

\begin{equation}\;\frac{{{\rm{d}}{\eta _i}\left( {{\bf{r}},t} \right)}}{{{\rm{d}}t}} = {\rm{\;}} - {L_i}\frac{{{{\delta}}F}}{{{{\delta}}{\eta _i}\left( {{\bf{r}},t} \right)}},\end{equation}

where L i is the mobility of the grain‐boundary migration.…”

Section: Experimental Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microstructural design of textured KSr₂Nb₅O₁₅ ceramics by a phase‐field simulation and lamination technique

et al. 2022

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“…Micro-structure numerical simulation technology is an effective means to predict and study the mechanism of eutectoid transformation, and has become a research hotspot [4,5] . The phasefield method (PFM) based on the Ginzburg-Landau theory is one of the most effective methods to deal with the dynamics of microstructure evolution [6][7][8] .…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional multi-phase-field simulation of eutectoid alloy based on OpenCL parallel

Zhu

Fang-lan

et al. 2021

China Foundry

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Seeking high-performance computing methods to solve the problem of a large amount of calculation, low calculation efficiency, and small simulation scale on the traditional single central processing unit (CPU) platform is of great value to the simulation study of micro-structure. In this study, based on the three-dimensional multi-phase-field model of KKSO coupling phase-field and solute field, the open computing language (OpenCL) + graphics processing unit (GPU) heterogeneous parallel computing technology is used to simulate the eutectoid growth of Fe-C alloy and the end growth process of pearlite under pure diffusion. The effects of initial supercooling and different diffusion coefficients on the growth morphology of lamellar pearlite were investigated. The results show that ferrite and cementite are perpendicular to the front of the solid-solid interface and are coupled and coordinated to grow, and there is no leading phase under the initial supercooling degree of 20 K. With the continuous increase of the initial supercooling degree (19 K-22 K), the morphology changes of the eutectoid layer are as follows: cementite stops growing → slice amplitude increases → regular symmetric growth → oblique growth → layer merge. With the increase of the diffusion coefficient from 3×10 -13 m 2 •s -1 to 15×10 -13 m 2 •s -1 , the growth rate of the microstructure of the lamellar pearlite increases linearly, and there is no obvious change in the frontal appearance of the pearlite.

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Electroceramics: Modeling of Sintering, Microstructure Evolution and Functional Properties

Hutanu

Lukacs

Mitoşeriu

2021

Encyclopedia of Materials: Technical Ceramics and Glasses

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Computational design of microstructures of textured ferroelectric ceramics by phase field simulation

Cited by 10 publications

References 22 publications

Microstructural design of textured KSr₂Nb₅O₁₅ ceramics by a phase‐field simulation and lamination technique

Microstructural design of textured KSr₂Nb₅O₁₅ ceramics by a phase‐field simulation and lamination technique

Three-dimensional multi-phase-field simulation of eutectoid alloy based on OpenCL parallel

Electroceramics: Modeling of Sintering, Microstructure Evolution and Functional Properties

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Computational design of microstructures of textured ferroelectric ceramics by phase field simulation

Cited by 10 publications

References 22 publications

Microstructural design of textured KSr2Nb5O15 ceramics by a phase‐field simulation and lamination technique

Microstructural design of textured KSr2Nb5O15 ceramics by a phase‐field simulation and lamination technique

Three-dimensional multi-phase-field simulation of eutectoid alloy based on OpenCL parallel

Electroceramics: Modeling of Sintering, Microstructure Evolution and Functional Properties

Contact Info

Product

Resources

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Microstructural design of textured KSr₂Nb₅O₁₅ ceramics by a phase‐field simulation and lamination technique

Microstructural design of textured KSr₂Nb₅O₁₅ ceramics by a phase‐field simulation and lamination technique