Melt dispersion mechanism for fast reaction of nanothermites

Valery I. Levitas; Blaine W. Asay; Steven F. Son; Michelle Pantoya

doi:10.1063/1.2335362

Melt dispersion mechanism for fast reaction of nanothermites

Valery I. Levitas, Blaine W. Asay, Steven F. Son, Michelle Pantoya

Mechanical Engineering

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

176 Scopus citations

Abstract

An unexpected mechanism for fast oxidation of Al nanoparticles covered by a thin oxide shell (OS) is proposed. The volume change due to melting of Al induces pressures of 0.1-4 GPa and causes spallation of the OS. A subsequent unloading wave creates high tensile pressures resulting in dispersion of liquid Al clusters, oxidation of which is not limited by diffusion (in contrast to traditional mechanisms). Physical parameters controlling this process are determined. Methods to promote this melt dispersion mechanism, and consequently, improve efficiency of energetic nanothermites are discussed.

Original language	English
Article number	071909
Journal	Applied Physics Letters
Volume	89
Issue number	7
DOIs	https://doi.org/10.1063/1.2335362
State	Published - 2006

Access to Document

10.1063/1.2335362

Cite this

@article{5a25906ce489438fbd4143380dcfc229,

title = "Melt dispersion mechanism for fast reaction of nanothermites",

abstract = "An unexpected mechanism for fast oxidation of Al nanoparticles covered by a thin oxide shell (OS) is proposed. The volume change due to melting of Al induces pressures of 0.1-4 GPa and causes spallation of the OS. A subsequent unloading wave creates high tensile pressures resulting in dispersion of liquid Al clusters, oxidation of which is not limited by diffusion (in contrast to traditional mechanisms). Physical parameters controlling this process are determined. Methods to promote this melt dispersion mechanism, and consequently, improve efficiency of energetic nanothermites are discussed.",

author = "Levitas, {Valery I.} and Asay, {Blaine W.} and Son, {Steven F.} and Michelle Pantoya",

year = "2006",

doi = "10.1063/1.2335362",

language = "English",

volume = "89",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "AIP Publishing",

number = "7",

}

TY - JOUR

T1 - Melt dispersion mechanism for fast reaction of nanothermites

AU - Levitas, Valery I.

AU - Asay, Blaine W.

AU - Son, Steven F.

AU - Pantoya, Michelle

PY - 2006

Y1 - 2006

N2 - An unexpected mechanism for fast oxidation of Al nanoparticles covered by a thin oxide shell (OS) is proposed. The volume change due to melting of Al induces pressures of 0.1-4 GPa and causes spallation of the OS. A subsequent unloading wave creates high tensile pressures resulting in dispersion of liquid Al clusters, oxidation of which is not limited by diffusion (in contrast to traditional mechanisms). Physical parameters controlling this process are determined. Methods to promote this melt dispersion mechanism, and consequently, improve efficiency of energetic nanothermites are discussed.

AB - An unexpected mechanism for fast oxidation of Al nanoparticles covered by a thin oxide shell (OS) is proposed. The volume change due to melting of Al induces pressures of 0.1-4 GPa and causes spallation of the OS. A subsequent unloading wave creates high tensile pressures resulting in dispersion of liquid Al clusters, oxidation of which is not limited by diffusion (in contrast to traditional mechanisms). Physical parameters controlling this process are determined. Methods to promote this melt dispersion mechanism, and consequently, improve efficiency of energetic nanothermites are discussed.

UR - http://www.scopus.com/inward/record.url?scp=33747484147&partnerID=8YFLogxK

U2 - 10.1063/1.2335362

DO - 10.1063/1.2335362

M3 - Article

AN - SCOPUS:33747484147

SN - 0003-6951

VL - 89

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 7

M1 - 071909

ER -

Melt dispersion mechanism for fast reaction of nanothermites

Abstract

Access to Document

Other files and links

Fingerprint

Cite this