Spinodal decomposition in a film with periodically distributed interfacial dislocations

S. Y. Hu, L. Q. Chen

Research output: Contribution to journalArticle

41 Scopus citations

Abstract

Phase field approach is applied to modeling the spinodal decomposition process in a thin film with periodically distributed arrays of interfacial dislocations. The elastic stress field in the simultaneous presence of interfacial dislocations, substrate constraint, and compositional strains is obtained by solving the mechanical equilibrium equations using an iteration method. It is shown that the periodic stress field associated with the array of interfacial dislocations leads to a directional phase separation and the formation of ordered mesoscale microstructures. It is demonstrated that when the periodicity of the dislocation is small, the wavelength of the ordered microstructure tends to be the same periodicity as the dislocation array. The results have important practical implications that an ordered nanostructures could be produced by controlling the interfacial dislocation distribution.

Original languageEnglish (US)
Pages (from-to)3069-3074
Number of pages6
JournalActa Materialia
Volume52
Issue number10
DOIs
StatePublished - Jun 7 2004

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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