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Title: Diffusive-to-ballistic transition in grain boundary motion studied by atomistic simulations

Abstract

An adapted simulation method is used to systematically study grain boundary motion at velocities and driving forces across more than five orders of magnitude. This analysis reveals that grain boundary migration can occur in two modes, depending upon the temperature (T) and applied driving force (P). At low P and T, grain boundary motion is diffusional, exhibiting the kinetics of a thermally activated system controlled by grain boundary self-diffusion. At high P and T, grain boundary migration exhibits the characteristic kinetic scaling behavior of a ballistic process. A rather broad transition range in both P and T lies between the regimes of diffusive and ballistic grain boundary motion, and is charted here in detail. In conclusion, the recognition and delineation of these two distinct modes of grain boundary migration also leads to the suggestion that many prior atomistic simulations might have probed a different kinetic regime of grain boundary motion (ballistic) as compared to that revealed in most experimental studies (diffusional).

Authors:
 [1];  [1]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Solid-State Solar-Thermal Energy Conversion Center (S3TEC); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1386853
Grant/Contract Number:  
SC0001299; FG02-09ER46577
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 84; Journal Issue: 21; Related Information: S3TEC partners with Massachusetts Institute of Technology (lead); Boston College; Oak Ridge National Laboratory; Rensselaer Polytechnic Institute; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; solar (photovoltaic); solar (thermal); solid state lighting; phonons; thermal conductivity; thermoelectric; defects; mechanical behavior; charge transport; spin dynamics; materials and chemistry by design; optics; synthesis (novel materials); synthesis (self-assembly); synthesis (scalable processing)

Citation Formats

Deng, Chuang, and Schuh, Christopher A. Diffusive-to-ballistic transition in grain boundary motion studied by atomistic simulations. United States: N. p., 2011. Web. doi:10.1103/PhysRevB.84.214102.
Deng, Chuang, & Schuh, Christopher A. Diffusive-to-ballistic transition in grain boundary motion studied by atomistic simulations. United States. https://doi.org/10.1103/PhysRevB.84.214102
Deng, Chuang, and Schuh, Christopher A. Tue . "Diffusive-to-ballistic transition in grain boundary motion studied by atomistic simulations". United States. https://doi.org/10.1103/PhysRevB.84.214102. https://www.osti.gov/servlets/purl/1386853.
@article{osti_1386853,
title = {Diffusive-to-ballistic transition in grain boundary motion studied by atomistic simulations},
author = {Deng, Chuang and Schuh, Christopher A.},
abstractNote = {An adapted simulation method is used to systematically study grain boundary motion at velocities and driving forces across more than five orders of magnitude. This analysis reveals that grain boundary migration can occur in two modes, depending upon the temperature (T) and applied driving force (P). At low P and T, grain boundary motion is diffusional, exhibiting the kinetics of a thermally activated system controlled by grain boundary self-diffusion. At high P and T, grain boundary migration exhibits the characteristic kinetic scaling behavior of a ballistic process. A rather broad transition range in both P and T lies between the regimes of diffusive and ballistic grain boundary motion, and is charted here in detail. In conclusion, the recognition and delineation of these two distinct modes of grain boundary migration also leads to the suggestion that many prior atomistic simulations might have probed a different kinetic regime of grain boundary motion (ballistic) as compared to that revealed in most experimental studies (diffusional).},
doi = {10.1103/PhysRevB.84.214102},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 21,
volume = 84,
place = {United States},
year = {Tue Dec 06 00:00:00 EST 2011},
month = {Tue Dec 06 00:00:00 EST 2011}
}

Journal Article:
Free Publicly Available Full Text
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Citation Metrics:
Cited by: 39 works
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Figures / Tables:

FIG. 1 FIG. 1: Schematic showing the measurement of grain boundary displacement dj (ti) by the (a) original interface-random-walk method31 and (b) adapted-interface-random-walk method. In (a), each row denotes a series of measurements of position at different times, t , for a given simulated boundary; there are 2$l$ rows corresponding to themore » two boundaries in each of the $l$ simulation cells. In (b), each row is expanded to reflect increased sampling of many different time intervals in a given simulation, inflating the number of viable data points.« less

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Works referencing / citing this record:

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Atomistic modeling of grain boundary motion as a random walk
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