Effect of compositional inhomgenities on decay of nanostructures
Abstract
The influence of composition on the evolution of nanostructures was studied using diffuse interface model in strained alloy films made of AB binary system. In this work we study the effect of stresses arising due to misfit and stresses formed because of difference in composition on the morphological changes arising due to Asaro-Tiller-Grinfield (ATG) instability. We model the alloy system using a ternary phase field model with a rich α phase as the film, B rich β phase as the substrate and a vapour phase. Depending on the intermixing or unmixing characteristics of the free energy, the growth as well as decay of the nanostructures can be addressed. Here we have attempted to characterize the evolution as a function of kinetic parameters such as surface and bulk diffusion coefficients of different species, material parameters such as elastic properties and operational parameters like deposition rate.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 2004
- Bibcode:
- 2004APS..MARL32008H