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Diffusion Growth and Morphological Stability of Two-Dimensional Grain Boundary Precipitates

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Author(s): A.V. Koropov

Journal: Journal of Nano- and Electronic Physics
ISSN 2077-6772

Volume: 2;
Issue: 4;
Date: 2010;
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Keywords: Supersaturated Solid Solutions | Aging Metal Alloys | Reactor Materials | Radiation Resistance | Macroscopic Inclusions | Precipitates | Grain Boundaries | Diffusion Growth | Morphological Stability

ABSTRACT
Diffusion growth of two-dimensional precipitates at the grain boundary of a finite thickness was considered with due regard to the diffusion fluxes of impurity atoms from the grain volume to the grain boundary. Stability of the growing precipitates of a relatively small radius was analyzed with respect to the small random perturbations of its size and subject to the surface kinetics of impurity atoms at the grain boundary/precipitate profile. Threshold radii of the precipitates, above which the amplitude of the shape defect and the amplitude of the relative shape deformation of the precipitates rise, were found.
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