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Phase Separation and Elastic Fields: Three Dimensional Simulations of a Phase Field Model

Published online by Cambridge University Press:  15 February 2011

Daniel Orlikowski ,
Celeste Sagui ,
Andrds Somoza  and
Christopher Roland
Daniel Orlikowski
Affiliation:
Department of Physics, North Carolina State University, Raleigh NC 27695
Celeste Sagui
Affiliation:
Department of Physics, North Carolina State University, Raleigh NC 27695
Andrds Somoza
Affiliation:
Departamento de Fisica, Universidad de Murcia, Apartado 4021 E-30080, Murcia, Spain
Christopher Roland
Affiliation:
Department of Physics, North Carolina State University, Raleigh NC 27695
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Abstract

The effects of long-range elastic fields on the phase separation process of three- dimensional binary alloy systems was investigated with large-scale Langevin simulations. The elastic effects incorporated in the model are the result of anisotropy and dilational misfits introduced via inhomogeneities in the elastic constants of the constituents. The domain morphology obtained is readily understandable in terms of selection criterion for the shape and/or orientation of the domains, and is based on the different shear moduli that are present in the system. Coarsening mechanisms were found to be a combination of the classical Ostwald ripening mechanism and the elastically-driven coalescence of domains. Other aspects of the coarsening process such as dynamic scaling of the structure function is presented.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 580: Symposium E – Nucleation & Growth Processes in Materials , 1999 , 21
Copyright
Copyright © Materials Research Society 2000

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