Solutal gradients in strained equilibrium

We demonstrate that the distortion of a crystal, caused by secondary phase precipitates, can stabilize a solutal gradient around the precipitate. The gradient persists in the quasi-static state stabilized by the gradient of the elastic energy around the precipitate. The peak concentration at the int...

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Bibliographic Details
Published in:Philosophical magazine letters 2013-12, Vol.93 (12), p.680-687
Main Authors: Darvishi Kamachali, R., Borukhovich, E., Shchyglo, O., Steinbach, I.
Format: Article
Language:English
Subjects:
Aluminum
Chemical precipitation
Cross-disciplinary physics: materials science
rheology
Crystallography
Crystals
diffusion
Distortion
Exact sciences and technology
Materials elasticity
Materials science
Mathematical models
Methods of crystal growth
physics of crystal growth
Nanoscience
Nanostructure
Physics
Precipitates
Precipitation
Ripening
Stability
Theory and models of crystal growth
physics of crystal growth, crystal morphology and orientation
transformation strain
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Summary:We demonstrate that the distortion of a crystal, caused by secondary phase precipitates, can stabilize a solutal gradient around the precipitate. The gradient persists in the quasi-static state stabilized by the gradient of the elastic energy around the precipitate. The peak concentration at the interface between precipitate and matrix hereby is independent of the radius of the precipitate and no mechanism of ripening is active in an arrangement of precipitates of different size. The model offers an explanation of experimental observations of the anomalous stability of nano-precipitates in Al-Cu.
ISSN:0950-0839
1362-3036
DOI:10.1080/09500839.2013.847288