Phase Relationships and Reaction Sintering of Transparent Cubic Aluminum Oxynitride Spinel

Abstract

A new isobaric, condensed phase diagram in the region of stability of cubic aluminum oxynitride spinel (ALON) along the pseudobinary Al2O3-AlN composition join is presented, deduced primarily from various analytical measurements and microstructural observations. It is shown that cubic aluminum oxynitride spinel melts incongruently at about 2050 C and is compositionally centered at about 35.7 mole % AlN which is equivalent to the following stoichiometric composition: Al23O27N5 or 5 AlN.9 Al2O3. Single-phase ALON material sintered to nearly full density exhibits transparency in visible light.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1979
Accession Number
ADA071801

Entities

People

  • James W. McCauley
  • Normand D. Corbin

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aluminum Oxides
  • Body Weight
  • Ceramic Materials
  • Chemical Compounds
  • Crystal Structure
  • Diffraction
  • Materials
  • Materials Engineering
  • Materials Processing
  • Materials Science
  • Mechanical Properties
  • Nitrogen
  • Oxides
  • Phase
  • Phase Diagrams
  • United States
  • Visible Spectra

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.
  • Spectroscopy.