Combustion of Al-Al2O3 mixtures in air

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Abstract

An experimental study on the aluminum oxynitride and aluminum nitride formation by combustion of mixtures of micron-sized aluminum powder (average particle diameter as ∼9.0 μm) and alumina nanopowder (as ∼0.05 μm) of the fixed mass (∼10 g) and different mass ratios (Al/γ-Al2O3 = 0.1-19.0) in air is reported. The formation of aluminum oxynitride (Al3O3N) and aluminum nitride during the combustion of powdery aluminum-based mixtures in air is discussed in this study. The combustion synthesis of Al3O3N and AlN was carried out in self-sustaining way. XPS-FESEM, XRD and chemical analysis were executed on final products of synthesis. The combustion process was also recorded by a video-camera. It was found that powdery mixtures, ignited by local heating, burned in one- or two-stage self-propagating regime. The combustion regime is different for different initial mass ratios Al/γ-Al2O3 and mainly depends on the content of fuel (aluminum powder) in mixture.

Original languageEnglish
Pages (from-to)1575-1579
Number of pages5
JournalJournal of the European Ceramic Society
Volume25
Issue number9
DOIs
Publication statusPublished - 1 Jun 2005

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Keywords

  • Al/ AlO
  • Mixing
  • Nitrides
  • Oxynitride
  • Thermal properties
  • X-ray diffraction

ASJC Scopus subject areas

  • Ceramics and Composites

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