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Phase field study of interfacial diffusion-driven spheroidization in a composite comprised of two mutually insoluble
1Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50011, USA.
This study uses the phase field method to simulate how cylindrical rods in composites change shape during annealing. Results confirm Rayleigh
Area of Science:
- Materials Science
- Computational Modeling
- Chemical Engineering
Background:
- Spheroidization is a common microstructural change in materials during annealing.
- Understanding this process is crucial for predicting material behavior and performance.
Purpose of the Study:
- To investigate the interfacial diffusion-driven spheroidization of cylindrical rod structures.
- To explore the kinetics of spheroidization using the diffuse interface phase field method.
Main Methods:
- Utilized the diffuse interface phase field method for simulation.
- Investigated a two-dimensional composite with two mutually insoluble phases.
- Analyzed the effect of various parameters on spheroidization kinetics.
Main Results:
- Simulations successfully modeled the spheroidization of cylindrical rods.
- Confirmed the influence of perturbation wavelength on spheroidization, aligning with Rayleigh's instability theory.
- Demonstrated good agreement between simulation results and experimental observations.
Conclusions:
- The phase field method is effective for simulating mesoscale morphological evolution.
- Rayleigh's instability criterion accurately predicts cylindrical spheroidization under specific conditions.
- The study provides insights into controlling microstructural evolution in composite materials.
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