Laser ignition of nanocomposite thermites

John J. Granier; Michelle L. Pantoya

doi:10.1016/j.combustflame.2004.05.006

Laser ignition of nanocomposite thermites

John J. Granier, Michelle L. Pantoya

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

335 Scopus citations

Abstract

Laser ignition experiments were performed to determine the ignition time of nanoscale particle diameter composites of aluminum (Al) and molybdenum trioxide (MoO ₃). Ignition time and burn rate were measured as a function of stoichiometry and also as a function of Al particle diameter, which ranged from 17.4 nm to 20 μm. Composites were pressed into solid cylindrical pellets with a 4.5-mm diameter and length and with a constant 38% theoretical maximum density (TMD). A 50-W CO ₂ laser provided the ignition source and high-speed digital images were used to determine ignition time and burn rates. Results indicate that nanoscale Al particle composites show significantly reduced ignition times that varied from 12 ms up to 6 s for nanometer compared with micrometer scale Al particle composites, respectively.

Original language	English
Pages (from-to)	373-383
Number of pages	11
Journal	Combustion and Flame
Volume	138
Issue number	4
DOIs	https://doi.org/10.1016/j.combustflame.2004.05.006
State	Published - Sep 2004

Keywords

Burn rates
Ignition delay time
Laser ignition
Nano aluminum combustion
Nanocomposite energetic materials

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10.1016/j.combustflame.2004.05.006

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title = "Laser ignition of nanocomposite thermites",

abstract = "Laser ignition experiments were performed to determine the ignition time of nanoscale particle diameter composites of aluminum (Al) and molybdenum trioxide (MoO 3). Ignition time and burn rate were measured as a function of stoichiometry and also as a function of Al particle diameter, which ranged from 17.4 nm to 20 μm. Composites were pressed into solid cylindrical pellets with a 4.5-mm diameter and length and with a constant 38% theoretical maximum density (TMD). A 50-W CO 2 laser provided the ignition source and high-speed digital images were used to determine ignition time and burn rates. Results indicate that nanoscale Al particle composites show significantly reduced ignition times that varied from 12 ms up to 6 s for nanometer compared with micrometer scale Al particle composites, respectively.",

keywords = "Burn rates, Ignition delay time, Laser ignition, Nano aluminum combustion, Nanocomposite energetic materials",

author = "Granier, {John J.} and Pantoya, {Michelle L.}",

note = "Funding Information: The authors gratefully acknowledge the Army Research Office (Contract DAAD19-02-1-0214) and their ARO program manager, Dr. David Mann. We are also thankful for partial support by the Los Alamos National Laboratory through the Advanced Energetics Initiative and the Defense Threat Reduction Agency (DTRA) and our colleague, Dr. Steven F. Son. ",

year = "2004",

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doi = "10.1016/j.combustflame.2004.05.006",

language = "English",

volume = "138",

pages = "373--383",

journal = "Combustion and Flame",

issn = "0010-2180",

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T1 - Laser ignition of nanocomposite thermites

AU - Granier, John J.

AU - Pantoya, Michelle L.

N1 - Funding Information: The authors gratefully acknowledge the Army Research Office (Contract DAAD19-02-1-0214) and their ARO program manager, Dr. David Mann. We are also thankful for partial support by the Los Alamos National Laboratory through the Advanced Energetics Initiative and the Defense Threat Reduction Agency (DTRA) and our colleague, Dr. Steven F. Son.

PY - 2004/9

Y1 - 2004/9

N2 - Laser ignition experiments were performed to determine the ignition time of nanoscale particle diameter composites of aluminum (Al) and molybdenum trioxide (MoO 3). Ignition time and burn rate were measured as a function of stoichiometry and also as a function of Al particle diameter, which ranged from 17.4 nm to 20 μm. Composites were pressed into solid cylindrical pellets with a 4.5-mm diameter and length and with a constant 38% theoretical maximum density (TMD). A 50-W CO 2 laser provided the ignition source and high-speed digital images were used to determine ignition time and burn rates. Results indicate that nanoscale Al particle composites show significantly reduced ignition times that varied from 12 ms up to 6 s for nanometer compared with micrometer scale Al particle composites, respectively.

AB - Laser ignition experiments were performed to determine the ignition time of nanoscale particle diameter composites of aluminum (Al) and molybdenum trioxide (MoO 3). Ignition time and burn rate were measured as a function of stoichiometry and also as a function of Al particle diameter, which ranged from 17.4 nm to 20 μm. Composites were pressed into solid cylindrical pellets with a 4.5-mm diameter and length and with a constant 38% theoretical maximum density (TMD). A 50-W CO 2 laser provided the ignition source and high-speed digital images were used to determine ignition time and burn rates. Results indicate that nanoscale Al particle composites show significantly reduced ignition times that varied from 12 ms up to 6 s for nanometer compared with micrometer scale Al particle composites, respectively.

KW - Burn rates

KW - Ignition delay time

KW - Laser ignition

KW - Nano aluminum combustion

KW - Nanocomposite energetic materials

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U2 - 10.1016/j.combustflame.2004.05.006

DO - 10.1016/j.combustflame.2004.05.006

M3 - Article

AN - SCOPUS:2642537563

SN - 0010-2180

VL - 138

SP - 373

EP - 383

JO - Combustion and Flame

JF - Combustion and Flame

IS - 4

ER -

Laser ignition of nanocomposite thermites

Abstract

Keywords

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