Development of New Ceramics for Novel Applications

Abstract

The major objectives of this contract were to establish a high pressure high temperature facility for the study of high performance ceramics and glasses and to begin sintering studies of nitride materials. A high temperature high pressure apparatus was developed and tested to pressures of 30 kilobars and 2150 C. This facility was used to sinter to 99% of theoretical density silicon nitride powders containing a few % of oxygen impurities but no additives. In addition a glass was melted which contained 20 atomic percent nitrogen in the starting materials. Details of the furnace and properties of the sintered materials are reported. Keywords: High pressure sintering, Nitrides, Si3N4, Ceramic materials.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1982
Accession Number
ADA222021

Entities

People

  • Deepak Varshneya
  • R. K. Mohr

Organizations

  • The Catholic University of America

Tags

Communities of Interest

  • Counter IED
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Chemical Reactions
  • Failure Mode And Effect Analysis
  • Glass
  • Glass Transition Temperature
  • Material Degradation Processes
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Measurement
  • Mechanical Properties
  • Optical Materials
  • Phase Diagrams
  • Phase Transformations
  • Single Crystals
  • Technical Ceramics
  • Transition Temperature

Fields of Study

  • Materials science

Readers

  • Combustion Dynamics and Shock Wave Physics.
  • Surface Engineering/Surface Coating Technology.
  • Systems Analysis and Design