Related Experiment Videos
Growth patterns in a channel for singular surface energy: phase-field model
Rahma Guérin1, Jean-Marc Debierre, Klaus Kassner
1Laboratoire Matériaux et Microélectronique de Provence, Université d'Aix-Marseille III and CNRS, Faculté des Sciences et Techniques de Saint-Jérôme, Case 151, 13397 Marseille Cedex 20, France.
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|February 9, 2005
Summary
This study reveals three distinct solidification modes in faceted materials based on anisotropy strength: single-finger, two-finger, and oscillating growth. These findings offer insights into crystal growth dynamics.
Area of Science:
- Materials Science
- Physics
- Crystallography
Background:
- Solidification of faceted materials is crucial in various applications.
- Understanding growth modes requires analyzing material anisotropy.
- Gamma plots provide insights into surface energy anisotropy.
Purpose of the Study:
- To investigate solidification patterns in a 2D channel for faceted materials.
- To identify and characterize different growth modes based on anisotropy.
- To develop models explaining the observed solidification behaviors.
Main Methods:
- Simulations of solidification in a two-dimensional channel.
- Analysis of faceted materials with cusps in their gamma plots.
- Development of geometrical and dynamical models for growth modes.
Main Results:
- Three distinct growth modes were identified: single faceted finger (high anisotropy), two faceted fingers (intermediate anisotropy), and oscillating mode (low anisotropy).
- One-finger patterns resemble free dendrites.
- Two-finger patterns are analogous to confined solidification fingers.
Conclusions:
- Material anisotropy strength dictates the solidification mode in 2D channels.
- The proposed models successfully explain the observed single-finger, two-finger, and oscillating growth patterns.
- This research enhances the understanding of crystal growth phenomena in anisotropic materials.