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External perturbations like thermal and convective effects influence asymmetric lamellar eutectics. This study reveals how these perturbations regulate eutectic growth patterns and transport equilibrium.

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Area of Science:

  • Materials Science
  • Physics
  • Chemical Engineering

Background:

  • Current understanding of asymmetric lamellar eutectics primarily considers pure diffusive transport.
  • The mechanisms by which external perturbations induce asymmetric pattern transitions are not well understood.

Purpose of the Study:

  • To investigate the impact of thermal and convective perturbations on asymmetric lamellar eutectics.
  • To elucidate how these perturbations influence eutectic growth patterns and transport equilibrium.

Main Methods:

  • Phase-field modeling was employed to simulate the effects of thermal and convective perturbations.
  • The study analyzed the resulting changes in eutectic lamellae structure and growth dynamics.

Main Results:

  • Thermal perturbations were found to distort eutectic lamellae.
  • Convective perturbations were observed to induce tilt bands.
  • Both perturbation types were shown to adjust eutectic trajectory by reconstructing transport equilibrium.

Conclusions:

  • External perturbations are critical in controlling asymmetric lamellar eutectic evolution.
  • Understanding these effects allows for regulation of eutectic growth into various patterns (colony, zigzag, snakelike).
  • This research provides insights into controlling eutectic evolution through external perturbation manipulation.