Thermo-kinetic study of core-shell nanothermites

A. Prakash, Alon V McCormick, M. R. Zachariah

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

This article presents the formulation of a new nano-thermite mixture (Al/KMnO4) for application in energetic materials. Reactivities of different thermite mixtures have been compared by a constant volume combustion experiment and the results indicate that the reactivity of the new formulation is two orders of magnitude greater than the traditional formulations. We also present a generic technique for synthesizing core-shell nanostructured composite particles as a means of controlling the reactivity and initiation. By coating a strong oxidizer nanoparticle (KMnO4; ∼150 nm) by a layer of mild oxidizer (Fe2O3; ∼4-15 nm) the measured reactivity in terms of pressurization rate (psi/μs) could be varied by more than a factor of 10. The composite oxidizer particles were synthesized by a two-temperature aerosol process where the non-wetting interaction between the two components of the particle causes phase segregation into a core-shell structure. We also show that the characteristic reaction times and particle length scales can be used to measure characteristic diffusion rates which are indicative of the reactivity of a thermite nanocomposite.

Original languageEnglish (US)
Title of host publicationSHOCK COMPRESSION OF CONDENSED MATTER - 2005
Subtitle of host publicationProceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter
Pages1006-1009
Number of pages4
DOIs
StatePublished - Dec 1 2006
EventSHOCK COMPRESSION OF CONDENSED MATTER - 2005: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter - Baltimore, MD, United States
Duration: Jul 31 2005Aug 5 2005

Publication series

NameAIP Conference Proceedings
Volume845 II
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherSHOCK COMPRESSION OF CONDENSED MATTER - 2005: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter
CountryUnited States
CityBaltimore, MD
Period7/31/058/5/05

Keywords

  • Core-shell
  • Nano-thermite
  • Pressurization rate
  • Pyrotechnics

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  • Cite this

    Prakash, A., McCormick, A. V., & Zachariah, M. R. (2006). Thermo-kinetic study of core-shell nanothermites. In SHOCK COMPRESSION OF CONDENSED MATTER - 2005: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter (pp. 1006-1009). (AIP Conference Proceedings; Vol. 845 II). https://doi.org/10.1063/1.2263492