Ultrasonic Evaluation of Silicon Nitride Green Bodies

Abstract

Advances in ultrasonic materials evaluation technology have greatly expanded the potential usefulness of this nondestructive testing technique to the ceramics industry. The development of dry coupling transducers has been especially beneficial to the early stages of ceramic processing with processing with increasing application to green body evaluation. In this study, ultrasonic techniques are utilized to determine property relationships in silicon nitride green bodies. A correlation of ultrasonic velocities with green body densities was found to be affected by a commercial plasticizer utilized in processing the slurries. This correlation was further investigated with photomicrographs, porosimetry, and a BET analysis.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1991
Accession Number
ADA237924

Entities

People

  • Janet Quinn
  • Lisa Tardiff

Tags

Communities of Interest

  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Properties
  • Acoustic Waves
  • Air Force
  • Ceramic Materials
  • Engineering
  • Materials
  • Materials Engineering
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Measurement
  • Military Research
  • Particles
  • Test And Evaluation
  • Transducers
  • Ultrasounds
  • Waves

Fields of Study

  • Materials science

Readers

  • Calculus or Mathematical Analysis
  • Materials Science and Engineering.
  • Reinforced Composite Materials