Ignition and combustion behaviors of nanocomposite Al/MoO3

John J. Granier, Michelle L. Pantoya

Research output: Contribution to journalConference articlepeer-review

6 Scopus citations

Abstract

Flame propagation in Al/MoO3 thermites is measured as a function of bulk density and initial sample temperature. The composites are composed of nano-scale reactant particles mixed and pressure molded to between 49 and 73% of the theoretical maximum density. A relationship between cylindrical die pressure and final pellet density is derived. Experiments are also performed by initially pre-heating samples to a uniform temperature ranging from 20 to 200°C. Ignition sensitivity was determined by measuring the ignition delay time and temperature using a 50-W CO2 laser and thermocouples, respectively. Combustion wave speeds were measured using high-speed imaging diagnostics. Results allow comparison of combustion behaviors associated with nano- vs. micron-scale particle composites. The nano-scale particle composites are extremely sensitive to ignition, especially when initially preheated. Combustion wave speeds for the compressed nano-composites were found to double when compared to the micron-scale composites.

Original languageEnglish
Pages (from-to)173-178
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume800
DOIs
StatePublished - 2003
EventSynthesis, Characterization and Properties of Energetic/Reactive Nanomaterials - Boston, MA., United States
Duration: Dec 1 2003Dec 4 2003

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