Rotation induced grain growth and stagnation in phase field crystal models

Abstract

We consider the grain growth and stagnation in polycrystalline microstructures. From the phase field crystal modelling of the coarsening dynamics, we identify a transition from a grain-growth stagnation upon deep quenching below the melting temperature $T_m$ to a continuous coarsening at shallower quenching near $T_m$. The grain evolution is mediated by local grain rotations. In the deep quenching regime, the grain assembly typically reaches a metastable state where the kinetic barrier for recrystallization across boundaries is too large and grain rotation with subsequent coalescence is infeasible. For quenching near $T_m$, we find that the grain growth depends on the average rate of grain rotation, and follows a power law behavior with time with a scaling exponent that depends on the quenching depth.

(4 pages, 4 figures)

References in corpus (4)

• Phase-field-crystal models for condensed matter dynamics on atomic length and diffusive time scales: an overview
• Phase-field Crystals with Elastic Interactions
• Phase-field crystal study of grain-boundary premelting
• Phase Diagram and Commensurate-Incommensurate Transitions in the Phase Field Crystal Model with an External Pinning Potential

Cited by in corpus (6)

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• Comparison of simulated and measured grain volume changes during grain growth
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• Rotation-limited growth of three dimensional body-centered cubic crystals
• Substrate curvature governs texture orientation in thin films of smectic block copolymers