Issue 41, 2015

Misfit stabilized embedded nanoparticles in metallic alloys


Nanoscale inhomogeneities are typical for numerous metallic alloys and crucially important for their practical applications. At the same time, stabilization mechanisms of such a state are poorly understood. We present a general overview of the problem, together with a more detailed discussion of the prototype example, namely, Guinier–Preston zones in Al-based alloys. It is shown that coherent strain due to a misfit between inclusion and host crystal lattices plays a decisive role in the emergence of the inhomogeneous state. We suggest a model explaining the formation of ultrathin plates (with the thickness of a few lattice constants) typical for Al–Cu alloys. Discreteness of the array of misfit dislocations and long-ranged elastic interactions between them are the key ingredients of the model. This opens a way for a general understanding of the nature of (meta)stable embedded nanoparticles in practically important systems.

Graphical abstract: Misfit stabilized embedded nanoparticles in metallic alloys

Article information

Article type
05 Aug 2015
23 Sep 2015
First published
24 Sep 2015
This article is Open Access
Creative Commons BY license

Phys. Chem. Chem. Phys., 2015,17, 27249-27257

Misfit stabilized embedded nanoparticles in metallic alloys

Yu. N. Gornostyrev and M. I. Katsnelson, Phys. Chem. Chem. Phys., 2015, 17, 27249 DOI: 10.1039/C5CP04641F

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