HREM Studies of Coherent and Incoherent Interfaces in ZrO2-Containing Ceramics: A Preliminary Account

Abstract

ZrO2-containing ceramics have attracted much attention in recent years because of their unusual mechanical and electrolytic properties. Their considerable potential for high-technology structural applications derives from the phenomenon of transformation toughening. Briefly, ZrO2, is polymorphic. The high-temperature form is cubic and is isostructural with CaF2 (fluorite structure). At temperatures below 2250 C for pure ZrO2, or at temperatures considerably lower for ZrO2 alloys, the cubic polymorph (c-ZrO2) transforms to a tetragonally distorted version of the fluorite structure. At still lower temperatures, t-ZrO2 transforms martensitically to the monoclinic structure shown in fig. 1c (m-ZrO2). (jes)

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1985
Accession Number
ADA224506

Entities

People

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

Organizations

  • Case Western Reserve University

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundaries
  • Crystallography
  • Crystals
  • Diffraction
  • Diffraction Analysis
  • Electron Beams
  • Electrons
  • Grain Boundaries
  • High Resolution
  • High Temperature
  • Image Processing
  • Materials
  • Materials Science
  • Metallurgy
  • Orientation (Direction)
  • Particles
  • Simulations

Fields of Study

  • Materials science

Readers

  • Economics
  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.