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Article
Melt dispersion mechanism for fast reaction of nanothermites
Applied Physics Letters (2006)
  • Valery I. Levitas, Texas Tech University
  • Blaine W. Asay, Los Alamos National Laboratory
  • Steven F. Son, Los Alamos National Laboratory
  • Michelle Pantoya, Texas Tech University
Abstract

An unexpected mechanism for fast oxidation of Alnanoparticles covered by a thin oxide shell (OS) is proposed. The volume change due to melting of Al induces pressures of 0.1–4GPa 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.

Publication Date
2006
Publisher Statement

This article is from Applied Physics Letters89 (2006): 071909, doi10.1063/1.2335362. Posted with permission.

Citation Information
Valery I. Levitas, Blaine W. Asay, Steven F. Son and Michelle Pantoya. "Melt dispersion mechanism for fast reaction of nanothermites" Applied Physics Letters Vol. 89 Iss. 7 (2006)
Available at: http://works.bepress.com/steven_son/1/