A New Process for Final Densification of Ceramics

Abstract

The objective of this program was to demonstrate the feasibility of novel densification process based on supercritical fluids. Using this process carbon/carbon composites were impregnated with silicon carbide precursors and pyrolyzed to produce oxidation resistant pore coatings. The resulting samples were characterized in terms of silicon distribution, mechanical properties, and oxidation resistance. The solubility behavior of candidate carbon and silicon carbide precursors was determined in supercritical propane and carbon dioxide. In addition, two silicon carbide precursors were fractionated and characterized to establish the molecular weight dependence of the char yield. The results of the solubility and fractionation studies were then used to guide the impregnation program.

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Document Details

Document Type
Technical Report
Publication Date
May 14, 1988
Accession Number
ADA199959

Entities

People

  • R. A. Wagner

Tags

Communities of Interest

  • Advanced Electronics
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Body Weight
  • Ceramic Materials
  • Chemical Synthesis
  • Chemistry
  • Composite Materials
  • Liquids
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Mechanical Properties
  • Oxidation Resistance
  • Physical Properties
  • Schematic Diagrams
  • Silicon Carbide
  • Surface Tension
  • Three Dimensional

Fields of Study

  • Materials science

Readers

  • Combustion science or combustion engineering.
  • Powder metallurgy of Titanium alloys.
  • Reinforced Composite Materials