Microstructure and phase composition of a zirconium coating-silicon substrate system treated using high-current electron beams

Vladimir Vasilevich Uglov, Nikolay Nikolaevich Koval, Yu F. Ivanov, Yu A. Petukhov, A. V. Kalin, A. D. Teresov

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The results of structural-phase conversions in a zirconium coating-silicon substrate system treated with low-energy high-current electron beams (LHEBs) are presented. It is revealed that the action of LHEBs with energy densities of 8-10 J/cm2 leads to the formation of a eutectic layer containing clusters with a characteristic size of 40-50 nm (the melt of ZrSi2 and silicon) at the zirconium-silicon interface. After the energy density reaches 12 J/cm2, silicon dendrites and regions of silicide crystallites are formed in the surface layer 20-30 μm thick. Data on the characteristic sizes of dendrites and eutectic clusters have made it possible to perform numerical estimation of the surface-melt overcooling (12-25 K), the temperature gradients (3. 7 × 107-1. 6 × 108 K/m), and the interphase boundary velocity (0. 8-3. 2 × 10-4 m/s).

Original languageEnglish
Pages (from-to)248-253
Number of pages6
JournalJournal of Surface Investigation
Issue number2
Publication statusPublished - 25 Apr 2013


ASJC Scopus subject areas

  • Surfaces, Coatings and Films

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