Investigation of Burning Aluminum in Oxygen-Enriched Atmospheres through Microanalysis Techniques

Suvorovs, Terese, Dewit, John R., Osborne, Barnaby P., & Steinberg, Theodore A. (2004) Investigation of Burning Aluminum in Oxygen-Enriched Atmospheres through Microanalysis Techniques. Journal of ASTM International, 1(8).

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Promoted-ignition testing of 3.2 mm diameter aluminum rods in high purity oxygen was performed. The rod and detached drops of both self-extinguished and water quenched samples were examined using scanning electron microscopy and electron probe microanalysis to analyze the physical structure of the sample and gather compositional data. A comparison of the micrographs of self-extinguished and quenched samples reveals clear differences in the extent of melted and re-solidified (unreacted) material and the thickness of the oxide layer, highlighting the effect of cooling rate on the burning system. A qualitative physical model for the burning of bulk aluminum in gaseous oxygen is presented. The model, incorporating a molten drop growth and detachment cycle, is based on an initial heterogeneous burning phase leading to a second phase of combined heterogeneous and homogeneous burning.

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ID Code: 2592
Item Type: Journal Article
Refereed: Yes
Additional Information: For more information, please refer to the journal’s website (see link) or contact the author. Author contact details:
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Keywords: promoted, ignition, aluminum, microanalysis, SEM, burning metal, oxidation, metals combustion, oxygen compatability
DOI: 10.1520/JAI12340
ISSN: 1546-962X
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300) > Mechanical Engineering not elsewhere classified (091399)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Copyright Owner: Copyright 2004 ASTM International
Deposited On: 17 Nov 2005 00:00
Last Modified: 29 Feb 2012 13:21

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