Accession Number:

ADA224507

Title:

Structure of Incoherent ZrO2/Al2O3 Interfaces

Descriptive Note:

Corporate Author:

CASE WESTERN RESERVE UNIV CLEVELAND OH DEPT OF METALLURGY AND MATERIALS SCIENCE

Report Date:

1986-03-01

Pagination or Media Count:

3.0

Abstract:

High-resolution electron microscopy was used to image incoherent ZrO2Al2O3 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 ZrO2Al2O3 interface. Zirconia-toughened alumina ZTA is the most important member of the wide class of ZrO2-containing dispersion-toughened ceramics. jes

Subject Categories:

  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE