On the order-disorder surface phase transition and critical temperature of pure metals originating from BCC, FCC, and HCP crystal structures

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Abstract

The excess surface Gibbs energy and surface tension of pure liquidmetals (originating from bcc, fcc, and hcp solid metals) of ordered and disordered surface structures are compared in this paper. It is shown that at a special temperature T* an order-disorder surface phase transition is expected in all liquid metals from a lowtemperature ordered surface state to a high-temperature disordered surface state. This surface phase transition is similar to the first-order bulk solid-liquid phase transition (melting). The values of T* appear in the temperature interval between the melting point and the critical point of metals. Critical temperatures of metals are estimated from the equation for high-temperature disordered surfaces.

Original languageEnglish
Pages (from-to)1177-1190
Number of pages14
JournalInternational Journal of Thermophysics
Volume33
Issue number7
DOIs
Publication statusPublished - Jul 1 2012

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Keywords

  • Critical temperature
  • Liquid metals
  • Order-disorder transition
  • Surface tension

ASJC Scopus subject areas

  • Condensed Matter Physics

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