Dislocation structures and strain fields in [111] low-angle tilt grain boundaries in zirconia bicrystals

Yuki Nohara, Eita Tochigi, Naoya Shibata, Takahisa Yamamoto, Yuichi Ikuhara

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Structures of <111> low-angle tilt grain boundaries in yttria-stabilized cubic zirconia bicrystals were characterized by conventional transmission electron microscopy, high-resolution transmission electron microscopy and high-angle annular dark-field scanning transmission electron microscopy. It is found that the 0.4 and 4.0° tilt grain boundaries are composed of periodic arrays of edge dislocations with Burgers vectors. The experimentally estimated strain field of each dislocation in the 0.4° tilt boundary was in good agreement with the theoretically predicted strain field from the Peierls-Nabarro model. On the other hand, the estimated strain field of each dislocation in the 4.0° tilt boundary was clearly different from that in the 0.4° tilt boundary, which suggests that the strain fields of neighbouring dislocations interact when the separation distance between dislocations is shorter than a critical value.

Original languageEnglish
Pages (from-to)S117-S121
JournalJournal of Electron Microscopy
Volume59
Issue numberSUPPL. 1
DOIs
Publication statusPublished - 2010 Aug
Externally publishedYes

Keywords

  • TEM
  • dislocation
  • geometric phase analysis
  • grain boundary
  • strain field
  • zirconia

ASJC Scopus subject areas

  • Instrumentation

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