Phase-field Crystals with Elastic Interactions

Details Phase-field Crystals with Elastic Interactions Phase-field Crystals with Elastic Interactions

2006-01-26

arxiv.org/abs/cond-mat/0601619v1

Physics

Condensed Matter

Materials Science

4 pages, 6 figures

Scientific paper

10.1103/PhysRevLett.96.225504

We report on a novel extension of the recent phase-field crystal (PFC) method introduced in [Elder et al., Phys. Rev. Lett., Vol. 88, 245701:1-4 (2002)], which incorporates elastic interactions as well as crystal plasticity and diffusive dynamics. In our model, elastic interactions are mediated through wave modes that propagate on time scales many orders of magnitude slower than atomic vibrations but still much faster than diffusive times scales. This allows us to preserve the quintessential advantage of the PFC model: the ability to simulate atomic-scale interactions and dynamics on time scales many orders of magnitude longer than characteristic vibrational time scales. We demonstrate the two different modes of propagation in our model and show that simulations of grain growth and elasto-plastic deformation are consistent with the microstructural properties of nanocrystals.

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