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Physics of the Solid State

, Volume 48, Issue 5, pp 815–820 | Cite as

Kinetics of isothermal nucleation in a supercooled iron melt

  • A. V. Evteev
  • A. T. Kosilov
  • E. V. Levchenko
  • O. B. Logachev
Metals and Superconductors

Abstract

An isothermal kinetic diagram for the beginning of homogeneous nucleation is constructed using the molecular-dynamics model of an instantaneously supercooled iron melt near the icosahedral percolation transition temperature identified with the glass transition temperature T g . This diagram is compared with the theoretical one calculated using quantitative information obtained by analyzing the kinetics of the initial stage of growth of supercritical nuclei at temperatures higher than T g . A satisfactory coincidence of the theoretical curve with computer simulation data at temperatures higher than T g and substantial disagreement with these data below T g , where crystallization is necessarily preceded by the formation of an icosahedral percolation cluster, demonstrate the substantive influence of an icosahedral substructure on the nucleation rate predicted by the classical theory.

PACS numbers

61.20.Ja 64.60.Ak 

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Copyright information

© Pleiades Publishing, Inc. 2006

Authors and Affiliations

  • A. V. Evteev
    • 1
  • A. T. Kosilov
    • 1
  • E. V. Levchenko
    • 1
  • O. B. Logachev
    • 1
  1. 1.Voronezh State Technical UniversityVoronezhRussia

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