Criteria for Diffusion by a Site‐Interchange Mechanism

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Criteria are established for evaluating whether self‐diffusion in a material may be occurring by a site‐interchange diffusion mechanism. The criteria include comparisons between defect formation and migration energies for the site‐interchange model and a normal vacancy diffsion model. These criteria are applied to some material systems to illustrate their utility. A site‐interchange diffusion mechanism is probably occurring in lithium niobate, but this mechanism is not operative in silicon carbide or in some III‐V compound semiconductors.

Original languageEnglish (US)
Pages (from-to)1277-1279
Number of pages3
JournalJournal of the American Ceramic Society
Issue number7
StatePublished - Jul 1989
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry


  • diffusion
  • lithium niobate
  • modeling
  • silicon carbide
  • stoichiometry

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