Simulation of surface and grain boundary properties of alumina by molecular dynamics method

Hiroshi Suzuki, Hideaki Matsubara, Jun Kishino, Toshiharu Kondoh

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Simulation of surfaces and grain boundaries of α-alumina were carried out by the molecular dynamics method using an ionic pair potential. Simulation of five different surfaces, (1101), (1104), (1102), (1120), (0001), showed that, although a distorted structure formed at the surface, the calculated surface energies (γsv) were similar to each other. Simulations of five grain boundary misorientations (general, near Σ11, basal twin, Σ7, Σ3 grain boundaries) showed that both the structure and calculated grain boundary energy (γgb) were markedly different for each boundary. The values of γsv and γgb were similar to those reported in previous simulation studies, but were larger than the experimentally measured values. The energy ratios, γgbsv, were in the range 0.07 to 1.11, which was comparable to experimental values previously determined. The molecular dynamics simulation of surfaces and grain boundaries is shown to be a useful technique for the microstructural design of ceramics on the atomic scale.

Original languageEnglish
Pages (from-to)1215-1222
Number of pages8
JournalJournal of the Ceramic Society of Japan
Volume106
Issue number12
DOIs
Publication statusPublished - 1998 Dec
Externally publishedYes

Keywords

  • Alumina
  • Grain boundary
  • Molecular dynamics simulation
  • Sintering
  • Surface

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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