Diffusion-controlled grain growth in two-phase solids

Danan Fan, Long Qing Chen

Research output: Contribution to journalArticlepeer-review

105 Scopus citations

Abstract

Microstructural evolution and the kinetics of grain growth in volume-conserved two-phase solids were investigated using two-dimensional (2-D) computer simulations based on a diffuse-interface field model. In this model, a two-phase microstructure is described by non-conserved field variables which represent crystallographic orientations of grains in each phase and by a conserved composition field variable which distinguishes the compositional difference between the two phases. The temporal and spatial evolution of these field variables were obtained through a numerical solution to the time-dependent Ginzburg-Landau (TDGL) equations. The effect of the ratios of grain boundary energies to interfacial energy on the microstructure features was systematically studied. It was found that grain growth in a volume-conserved two-phase solid is controlled by long-range diffusion and follows the power growth law, Rm - Rmo = kt with m = 3 in the scaling regime for all cases studied, including the microstructures containing only quadrijunctions. The effects of volume fractions and initial microstructures are discussed.

Original languageEnglish (US)
Pages (from-to)3297-3310
Number of pages14
JournalActa Materialia
Volume45
Issue number8
DOIs
StatePublished - Aug 1997

All Science Journal Classification (ASJC) codes

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

Fingerprint Dive into the research topics of 'Diffusion-controlled grain growth in two-phase solids'. Together they form a unique fingerprint.

Cite this