研究目的
Investigating the relationship between the aspect ratio and fraction of template particles for the templated grain growth (TGG) process with a high degree of texture in ferroelectric ceramics.
研究成果
Phase field simulations and experiments validated the model's effectiveness in studying the TGG process. The critical interval of template particles was optimized, showing a linear increase with aspect ratio. The study suggests that reducing template size and increasing template fraction is an effective approach to obtain a higher degree of texture, with continuous distribution of template particle size promoting densification of textured ceramics.
研究不足
The study focuses on 2D simulations, which may not fully capture the complexity of 3D microstructure evolutions. Experimental challenges include the directional arrangement of template particles with low aspect ratios and uniform distribution of template particles with high aspect ratios.
1：Experimental Design and Method Selection:
Phase field simulations were used to analyze grain-oriented microstructure evolutions of ferroelectric ceramics. The model included anisotropic grain boundary energy to simulate the TGG process.
2：Sample Selection and Data Sources:
KSN (KSr2Nb5O15) was used as a target ceramic, with template and matrix particles having the same composition.
3：List of Experimental Equipment and Materials:
MATLAB software for simulation visualization, SEM (Quanta 600 FEG) for microstructure observation.
4：Experimental Procedures and Operational Workflow:
Initial microstructures were set with one template and grain microstructure evolution was simulated as a function of time step (TS). The effect of template particle spacing and aspect ratio on microstructure evolution was investigated.
5：Data Analysis Methods:
The relationship between critical interval and aspect ratio of template particles was analyzed, and the fraction of template grains was calculated.
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