Ignition and combustion behaviors of nanocomposite Al/MoO3

John J. Granier; Michelle L. Pantoya

doi:10.1557/proc-800-aa5.3

Ignition and combustion behaviors of nanocomposite Al/MoO₃

John J. Granier, Michelle L. Pantoya

Mechanical Engineering

Research output: Contribution to journal › Conference article › peer-review

7 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 language	English
Pages (from-to)	173-178
Number of pages	6
Journal	Materials Research Society Symposium - Proceedings
Volume	800
DOIs	https://doi.org/10.1557/proc-800-aa5.3
State	Published - 2003
Event	Synthesis, Characterization and Properties of Energetic/Reactive Nanomaterials - Boston, MA., United States Duration: Dec 1 2003 → Dec 4 2003

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title = "Ignition and combustion behaviors of nanocomposite Al/MoO3",

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.",

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note = "Synthesis, Characterization and Properties of Energetic/Reactive Nanomaterials ; Conference date: 01-12-2003 Through 04-12-2003",

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TY - JOUR

T1 - Ignition and combustion behaviors of nanocomposite Al/MoO3

AU - Granier, John J.

AU - Pantoya, Michelle L.

PY - 2003

Y1 - 2003

N2 - 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.

AB - 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.

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U2 - 10.1557/proc-800-aa5.3

DO - 10.1557/proc-800-aa5.3

M3 - Conference article

AN - SCOPUS:2442473918

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VL - 800

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JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

T2 - Synthesis, Characterization and Properties of Energetic/Reactive Nanomaterials

Y2 - 1 December 2003 through 4 December 2003

ER -

Ignition and combustion behaviors of nanocomposite Al/MoO₃

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