Measurement and modelling of the wettability of graphite by a silver-tin (Ag-Sn) liquid alloy

Zoltán Weltsch, Antal Lovas, János Takács, Ágnes Cziráki, Attila Toth, George Kaptay

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The wettability of graphite by the silver-tin (Ag-Sn) liquid alloy was measured using the sessile drop method at a temperature interval of 1273-1473 K. The system is found poorly wetting with the contact angle at an interval of 125...142°. The contact angle passed through an elongated maximum as function of composition and increased with temperature. It was shown that no dissolution or chemical reaction takes place in the system up to 1473 K. The Butler equation was extended to calculate the concentration dependence of surface tension, solid/liquid interfacial energy and that of the contact angle theoretically. The theoretical results reasonably reproduce the measured values.

Original languageEnglish
Pages (from-to)52-60
Number of pages9
JournalApplied Surface Science
Publication statusPublished - Jan 1 2013



  • Ag-Sn liquid alloy
  • Butler equation
  • Contact angle
  • Graphite
  • Modeling
  • Wetting

ASJC Scopus subject areas

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

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