Organometallic Precursor Routes to Si-C-Al-O-N Ceramics

Abstract

This report describes the results of a research program directed at the development of improved methods for the preparation of Si-C-Al-O-N ceramics using organometallic precursors. Two main approaches were employed in these studies, (1) co-pyrolysis of homogeneous mixtures of organosilicon and organoaluminum precursors and (2) pyrolysis of specially designed, single- component precursors containing both Si and Al. Depending on the choice of precursors and the pyrolysis atmosphere employed, nanocrystalline Beta-SiC/2H- AlN and Si3N4/AlN composites, 2H-SiC/AlN solid solutions, and various crystalline SiAlON phases were obtained as final ceramic products after annealing at 1400-1800 C the initially amorphous pre-ceramic phases obtained on pyrolysis to 1000 C.

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Document Details

Document Type
Technical Report
Publication Date
May 15, 1991
Accession Number
ADA237753

Entities

People

  • Leonard V. Interrante

Organizations

  • Rensselaer Polytechnic Institute

Tags

Communities of Interest

  • Advanced Electronics
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Amorphous Materials
  • Ceramic Materials
  • Ceramic Matrix Composites
  • Chemical Reactions
  • Chemical Synthesis
  • Chemistry
  • Composite Materials
  • Materials
  • Materials Engineering
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Mechanical Properties
  • Organic Chemistry
  • Phase Diagrams
  • Spectra

Fields of Study

  • Materials science

Readers

  • Organic Chemistry
  • Powder metallurgy of Titanium alloys.