Mixing of Ta-Fe and Mo-Fe systems using a low-energy, high-current electron beam

A. D. Pogrebnjak, O. G. Bakharev, V. V. Sushko, S. Bratushka, A. D. Mikhaliov, Yu F. Ivanov, A. B. Markov, D. I. Proskurovskiy, V. P. Rotstein, A. N. Valyaev

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18 Citations (Scopus)


Rutherford backscattering spectroscopy, Auger electron spectroscopy, conversion electron Mössbauer spectroscopy, transmission microscopy and scanning electron microscopy showed that treatment of a thin Ta or Mo film/α-Fe substrate system with a high-current electron beam (HCEB) of an energy density of 2,3-5.2 J cm-2 resulted in a mixing of the system's components. In the energy range 2.3-3.3 J cm-2 in the HCEB-irradiated Ta-Fe system, we found a mixed layer of a thickness of about 100 nm, which we relate to the formation of a stable compound (Fe2Ta, FeTa) and a non-equilibrium Fe5Ta2 compound. The irradiated surface is not uniform, being composed of Ta inclusions of a spherical form (300 nm diameter), solid-solution Fe(Ta) and amorphous-phase Fe-Ta. An increase in the pulse number results in the formation of the volume fraction FeTa and a dislocation density of 5 × 1010 cm-2. It has been shown that HCEB irradiation of the Mo-Fe system with energy flow densities of 2.3-3.3 J cm-2 produced a mixed layer of a thickness of up to 150 nm, and a non-equilibrium Fe4Mo compound (Fe80Mo20) was formed. On increasing the energy density to 4.2 J cm-2, we observed partial Mo ablation and the formation of a mixed compound with a Mo concentration of several at.%.

Original languageEnglish
Pages (from-to)98-110
Number of pages13
JournalSurface and Coatings Technology
Issue number1-2
Publication statusPublished - 5 Feb 1998


  • Amorphous
  • Dislocation
  • Hardening
  • Melting
  • Metastable phase

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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