Structure of Incoherent ZrO2/Al2O3 Interfaces

Abstract

High-resolution electron microscopy was used to image incoherent ZrO2/Al2O3 interfaces in ZrO2-toughened Al2O3 containing intragranular ZrO2. These particles are generally spherical but are sometimes faceted. High- resolution electron micrographs provide atomic-level information on the interfacial structure. For spherical particles, both ledgelike images and misfit dislocation-like images accommodated the lattice misfit, depending on the orientation of the interface, while faceted particles imply at least one low- energy ZrO2/Al2O3 interface. Zirconia-toughened alumina (ZTA) is the most important member of the wide class of ZrO2-containing dispersion-toughened ceramics. (jes)

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1986
Accession Number
ADA224507

Entities

People

  • A. H. Heuer
  • S. P. Kraus-lanteri
  • T. E. Mitchell

Organizations

  • Case Western Reserve University

Tags

DTIC Thesaurus Topics

  • Dislocations
  • Electron Beams
  • Electron Microscopes
  • Electron Microscopy
  • Electrons
  • Grain Boundaries
  • High Resolution
  • Ion Beams
  • Ions
  • Materials
  • Materials Science
  • Microscopes
  • Microscopy
  • Orientation (Direction)
  • Particles
  • Phase Transformations

Readers

  • Materials Science and Engineering.

Technology Areas

  • Microelectronics