Stress Corrosion of Ceramic Materials.

Abstract

Environmentally enhanced crack growth data was obtained on Gallium Arsenide in water and methanol. No effect of ammonia was observed. Strains in the liquid encapsulated Czochralski (LEC)/GaAs crystals were mapped using x-ray topography. Critical fracture toughness and dynamic fatigue data were obtained on capacitor ceramics of varying composition and microstructure. A wide range of values for KIC and crack growth exponent, N, were observed. Collaborative work with Draper Labs and North American Phillips was performed in an effort to develop a non-destructive crack detection procedure.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1987
Accession Number
ADA190501

Entities

People

  • G. S. White
  • S. M. Wiederhorn
  • S. W. Freiman
  • T. D. Coyle
  • T. L. Baker

Organizations

  • National Institute of Standards and Technology

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Ceramic Materials
  • Chemical Reactions
  • Chemical Synthesis
  • Chemistry
  • Crack Propagation
  • Crack Tips
  • Cracks
  • Crystal Defects
  • Crystal Lattices
  • Crystal Structure
  • Crystals
  • Curie Temperature
  • Dielectric Permittivity
  • Materials
  • Materials Science
  • Mechanics
  • Stresses

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Materials Science and Engineering.
  • Research Science/Academic Research

Technology Areas

  • Microelectronics