Diffusion decomposition of nanocrystalline alloys at generation of non-equilibrium vacancies on grain boundaries(Article)
- aUral State Prof.-Pedagogical Univ., RU-620012 Ekaterinburg, Russian Federation
- bInstitute of Metal Physics, Russian Academy of Sciences, Ural Branch, 18 Kovalevskaya Street, RU-620219 Ekaterinburg, Russian Federation
Abstract
The problem of formation of decomposition zone in nanograin under generation of non-equilibrium vacancies from boundaries, when volume sinks for them are absent has been solved. Two space-time scales characterizing the anomalous diffusion of components responsible for the occurrence of comparatively narrow adjacent boundary region with changed concentration and the process of diffusion of vacancies proper expanding to distances that are significantly far away from the boundary, respectively, have been revealed. The peculiarities of spatial distribution of concentration inhomogeneity near boundary have been analyzed.
Indexed keywords
| Engineering controlled terms: | AlloysDecompositionDiffusion in solidsGrain boundariesPlastic deformationSolid solutions |
|---|---|
| Engineering uncontrolled terms: | Nonequilibrium vacancies |
| Engineering main heading: | Nanostructured materials |
- ISSN: 02555476
- CODEN: MSFOE
- Source Type: Conference Proceeding
- Original language: English
- Document Type: Article
- Sponsors: DFG,IFW,SMWK,Fritsch GmbH
- Publisher: Trans Tech Publ,Uetikon-Zuerich, Switzerland
Gapontzev, V.L.; Ural State Professional-Pedagogical, Univ, Russian Federation
© Copyright 2005 Elsevier Science B.V., Amsterdam. All rights reserved.