Anion Controlled Microstructures in the Al2O3-AIN System

Abstract

The phase equilibria of the pseudo-binary Al2O3-A1N composition join has been extensively investigated, especially with respect to the processing of ALON--a nitrogen stabilized aluminum oxide spinel phase that can be sintered into transparent polycyrstalline ceramics. The system exhibits a wide variety of features and resulting microstructures: two spinel phases, vapor-solid and liquid-solid eutectics, A1N polytype-like structures, and alpha-Al2O3/spinel modulated structures. This system provides a unique perspective to a series of quite different materials based on a constant cation chemistry, with a continuous variation in the O/N anion ratio.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1988
Accession Number
ADA203671

Entities

People

  • A. Zangvill
  • Gray C. Thomas
  • James W. McCauley
  • K. M. Krishnan
  • R. S. Rai

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Advanced Materials
  • Aluminum Oxides
  • Chemical Analysis
  • Chemical Compounds
  • Chemistry
  • Crystal Chemistry
  • Engineered Materials
  • Engineering
  • Materials
  • Materials Engineering
  • Materials Science
  • Materials Testing
  • Mechanical Properties
  • Metallurgy
  • Military Research
  • Phase Diagrams
  • Plastic Explosives

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.