Passivation of the surface of aluminum nanopowders by protective coatings of the different chemical origin

Young Soon Kwon, Alexander A. Gromov, Julia I. Strokova

Research output: Contribution to journalArticle

99 Citations (Scopus)

Abstract

The results of investigation and analysis of electro-exploded aluminum nanopowders, whose surface were passivated with the following substances: liquids - nitrocellulose (NC), oleic acid (C17H33COOH) and stearic acid (C17H35COOH), suspended in kerosene and ethanol, fluoropolymer; solids - boron and nickel; gases - N2, CO2 and air (for a comparison) are discussed. The surface protection for the aluminum nanopowders by coatings of different chemical origins leads to the some advantages of the powders properties for an application in energetic systems, e.g. solid propellants and "green" propellants (Al-H2O). Aluminum nanopowders with a protected surface showed the increased stability to oxidation in air during the storage period and higher reactivity by heating. The TEM-visual diagram of the formation and stabilization of the coatings on the particles has been proposed on the basis of experimental results. The kinetics of the interaction of aluminum nanopowders with air has been discussed. The recommendations concerning an efficiency of the protective "non-Al2O3" layers on aluminum nanoparticles were proposed.

Original languageEnglish
Pages (from-to)5558-5564
Number of pages7
JournalApplied Surface Science
Volume253
Issue number12
DOIs
Publication statusPublished - 15 Apr 2007

Keywords

  • Aluminum
  • Coating
  • DTA-DSC-TG
  • Nanopowder
  • Oxidation
  • Stability
  • Surface passivation
  • TEM

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Condensed Matter Physics

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