Computer simulations of interactions between ultrafine alumina particles produced by an arc discharge

M. H. Teng*, L. D. Marks, D. L. Johnson

*Corresponding author for this work

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

We wrote two computer programs, 3D and BUMP, to interpret transmission electron microscope (TEM) micrographs made during a study of the initial stage sintering of ultrafine alumina particles (UFP's, 20-50 nm in diameter). The first simulated the 3D geometric relationships of particles, from which we concluded that surface diffusion was the predominant sintering mechanism because no shrinkage occurred. BUMP simulated random contact of two particles and showed that the particle chains that formed before sintering were not formed purely by chance. Instead the particles experienced a rearrangement process (rotation and sliding) which reduced the total surface energy.

Original languageEnglish (US)
Pages (from-to)235-243
Number of pages9
JournalJournal of Materials Research
Volume12
Issue number1
DOIs
StatePublished - Jan 1 1997

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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