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Indexed by:期刊论文

Date of Publication:2006-11-01

Journal:SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS

Included Journals:SCIE、EI、Scopus

Volume:7

Issue:8

Page Number:812-818

ISSN No.:1468-6996

Key Words:grain growth; Potts model; Monte Carlo simulation; nanostructured materials

Abstract:To systematically study normal grain growth in a two-phase volume-conserved system, a modified Potts model is proposed, in which the driving forces for grain boundary migration are the interfacial energy between two phases and the boundary energy inside each phase. Model-based simulation results show that the grain growth kinetics follows a power law with a temperature-independent exponent and that the normalized grain size distribution is lognormal and time invariant. Also, a simple theoretical model is used to predict the potential microstructure in a two-phase system due to the competition between interfacial and grain boundary energies. A critical ratio (similar to 2.6) of the grain boundary energy to the interfacial energy is found for a common two-phase system. (c) 2006 NIMS and Elsevier Ltd. All rights reserved.