Passivation process for superfine aluminum powders obtained by electrical explosion of wires

Young Soon Kwon, Alexander A. Gromov, Alexander P. Ilyin, Geun Hie Rim

Research output: Contribution to journalArticle

89 Citations (Scopus)

Abstract

The process of passivation of superfine aluminum powders (SFAPs) (as ≤ 100 nm), obtained with the electrical explosion of wires (EEW) method, has been studied. The passivation coatings of different nature (oxides, stearic acid and aluminum diboride) were covered on the particle surface. The process of passivation and analysis of passivated powders was studied by X-ray photoelectron spectroscopy (XPS), XRD, TEM, infrared spectroscopy (IR), mass spectrometry (MS), thermocouple method and bomb calorimetry. After the comprehensive testing of coatings, a model of stabilization of the superfine aluminum particles was suggested, explaining the anomalous high content of aluminum metal in the electroexplosive powders. The main characteristic of the model is a formation of charged structures, which prevent metal oxidation.

Original languageEnglish
Pages (from-to)57-67
Number of pages11
JournalApplied Surface Science
Volume211
Issue number1-4
DOIs
Publication statusPublished - 30 Apr 2003

Keywords

  • Oxidation
  • Passivation
  • Superfine aluminum powders
  • Surface structure
  • Thin films

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

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