- Title
- Composition effect on shrinkage of hollow binary alloy nanospheres
- Creator
- Evteev, A. V.; Levchenko, E. V.; Belova, I. V.; Murch, G. E.
- Relation
- Defect and Diffusion Forum Vol. 289-292, p. 665-672
- Publisher Link
- http://dx.doi.org/10.4028/www.scientific.net/DDF.289-292.665
- Publisher
- Trans Tech Publications
- Resource Type
- journal article
- Date
- 2009
- Description
- In this paper, a hollow random binary alloy nanosphere and initially homogeneous is considered under the approximation that the radial dependence of the vacancy formation free energy can be neglected. On the basis of a theoretical description and kinetic Monte Carlo simulations it is shown that the steady-state condition for the atomic components is not achievable during its shrinkage at any composition when the ratio of the tracer diffusion coefficients D*ᴀ/D*ʙ not greater than two orders of magnitude. In the theoretical description, the dependence of the collapse time of the hollow random binary alloy nanosphere on the atomic fraction x of the faster diffusing species at x ≤ 0.5 can be estimated by using the geometric mean of the ratios of the atomic fluxes at self-diffusion and steady-state. At x > 0.5 the ratio of the atomic fluxes approaches the self-diffusion ratio as x increases.
- Subject
- diffusion; stability; vacancies; Monte Carlo simulation; binary alloy; hollow nanospheres
- Identifier
- http://hdl.handle.net/1959.13/809131
- Identifier
- uon:7832
- Identifier
- ISSN:1012-0386
- Language
- eng
- Full Text
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