Thermodynamic model of porosity stabilization in polycrystalline solids

L. Klinger, E. Rabkin

Research output: Contribution to journalArticlepeer-review

Abstract

We demonstrate that a strong surface segregation of one of the components of the binary polycrystalline material can lead to barrier-less pore formation at the triple and quadruple junctions of the grain boundaries. These pores deplete the bulk of the polycrystal from the segregating component, which can lead to a local minimum in the dependence of the Gibbs free energy of the system on the pore size. We show that in some cases a porous polycrystal can be thermodynamically stabilized.

Original languageEnglish
Pages (from-to)75-79
Number of pages5
JournalScripta Materialia
Volume156
DOIs
StatePublished - Nov 2018

Keywords

  • Grain boundary segregation
  • Modeling
  • Nanocrystalline materials
  • Surface segregation
  • Thermodynamics

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • General Materials Science

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