Document Detail


Phase-field modeling of grain-boundary premelting using obstacle potentials.
MedLine Citation:
PMID:  25122309     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
We investigate the multiorder parameter phase field model of Steinbach and Pezzolla [Physica D 134, 385 (1999)] concerning its ability to describe grain boundary premelting. For a single order parameter situation solid-melt interfaces are always attractive, which allows us to have (unstable) equilibrium solid-melt-solid coexistence above the bulk melting point. The temperature-dependent melt layer thickness and the disjoining potential, which describe the interface interaction, are affected by the choice of the thermal coupling function and the measure to define the amount of the liquid phase. Due to the strictly finite interface thickness the interaction range also is finite. For a multiorder parameter model we find either purely attractive or purely repulsive finite-ranged interactions. The premelting transition is then directly linked to the ratio of the grain boundary and solid-melt interfacial energy.
Authors:
V Sai Pavan Kumar Bhogireddy; C Hüter; J Neugebauer; I Steinbach; A Karma; R Spatschek
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Publication Detail:
Type:  Journal Article     Date:  2014-07-03
Journal Detail:
Title:  Physical review. E, Statistical, nonlinear, and soft matter physics     Volume:  90     ISSN:  1550-2376     ISO Abbreviation:  Phys Rev E Stat Nonlin Soft Matter Phys     Publication Date:  2014 Jul 
Date Detail:
Created Date:  2014-08-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101136452     Medline TA:  Phys Rev E Stat Nonlin Soft Matter Phys     Country:  United States    
Other Details:
Languages:  eng     Pagination:  012401     Citation Subset:  IM    
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