Bimetal Al–Ni nano-powders for energetic formulations

Ani Abraham, Hongqi Nie, Mirko Schoenitz, Alexander B. Vorozhtsov, Marat Lerner, Alexander Vasilievich Pervikov, Nikolay Rodkevich, Edward L. Dreizin

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Four bimetal Al–Ni nano-powders with compositions varied from 5 to 45 at% of nickel were synthesized by explosion of electrically heated twisted pure Al and Ni wires in argon. The nano-powders were characterized using electron microscopy, x-ray diffraction, and thermal analysis. Materials were ignited using an electrically heated filament coated with powder and electrostatic discharge (ESD). The results were compared to those for pure nano-aluminum powder (n-Al) prepared using the same wire explosion technique. The nano-powders with high nickel concentrations contain fully reacted intermetallic phases, which are difficult to oxidize making them unattractive for energetic formulations. Nano-powders with lower nickel concentrations do not contain significant amounts of the intermetallic phases. No intermetallics were detected in the powder with 5 at% Ni, which oxidized qualitatively similar to n-Al. The overall mass gain during oxidation for the bimetal powder was nearly identical to that of n-Al, suggesting the same heat release anticipated from their combustion. Oxidation kinetics assessed for this material accounting directly for the measured particle size distribution was compared to that of n-Al. The bimetal powder oxidized slower than n-Al, indicating its greater stability during handling and storage. The bimetal powder was less ESD-ignition sensitive than n-Al, but generated a stronger emission signal when ignited. Therefore, the bimetal powder with 5 at% Ni is an attractive replacement of n-Al for advanced energetics with lower ESD sensitivity, better stability, and improved combustion performance.

Original languageEnglish
Pages (from-to)179-186
Number of pages8
JournalCombustion and Flame
Volume173
DOIs
Publication statusPublished - 1 Nov 2016

Fingerprint

bimetals
Bimetals
Powders
formulations
Aluminum
Electrostatic discharge
aluminum
Nickel
Intermetallics
intermetallics
nickel
electrostatics
Explosions
explosions
wire
Wire
Oxidation
oxidation
Argon

Keywords

  • Aluminum ignition
  • Combustion temperature
  • Electro-static discharge
  • Nano-aluminum aging
  • Nano-aluminum sensitivity
  • Thermal analysis

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Physics and Astronomy(all)

Cite this

Bimetal Al–Ni nano-powders for energetic formulations. / Abraham, Ani; Nie, Hongqi; Schoenitz, Mirko; Vorozhtsov, Alexander B.; Lerner, Marat; Pervikov, Alexander Vasilievich; Rodkevich, Nikolay; Dreizin, Edward L.

In: Combustion and Flame, Vol. 173, 01.11.2016, p. 179-186.

Research output: Contribution to journalArticle

Abraham, A, Nie, H, Schoenitz, M, Vorozhtsov, AB, Lerner, M, Pervikov, AV, Rodkevich, N & Dreizin, EL 2016, 'Bimetal Al–Ni nano-powders for energetic formulations', Combustion and Flame, vol. 173, pp. 179-186. https://doi.org/10.1016/j.combustflame.2016.08.015
Abraham, Ani ; Nie, Hongqi ; Schoenitz, Mirko ; Vorozhtsov, Alexander B. ; Lerner, Marat ; Pervikov, Alexander Vasilievich ; Rodkevich, Nikolay ; Dreizin, Edward L. / Bimetal Al–Ni nano-powders for energetic formulations. In: Combustion and Flame. 2016 ; Vol. 173. pp. 179-186.
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