Growth of a coherent precipitate from a supersaturated solution

V. J. Laraia, William C. Johnson, P. W. Voorhees

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

A treatment of diffusion limited growth of a coherent spherical precipitate into supersaturated solution is presented. It is found that the growth kinetics are affected by dilatational coherency strains and by compositionally induced strains in the matrix phase. Numerical solutions to the time-dependent problem are obtained and are compared to the quasistationary solution. The parabolic growth coefficient is a function of the transformation strain, partial molar volumes of the components, elastic constants in each phase, interfacial compositions and far-field composition while, in contrast, the growth coefficient in the absence of stress is a function only of the reduced supersaturation. Elastic effects shift the interfacial concentration of the matrix in the direction of the far-field concentration, reducing the effective driving force for growth. At the same time, compositionally induced strains increase the diffusive flux, increasing the growth rate.

Original languageEnglish (US)
Pages (from-to)257-266
Number of pages10
JournalJournal of Materials Research
Volume3
Issue number2
DOIs
StatePublished - Jan 1 1988

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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