Journal of Materials Science

, Volume 21, Issue 8, pp 2787–2792 | Cite as

The surface tension of liquid pure aluminium and aluminium-magnesium alloy

  • C. Garcia-Cordovilla
  • E. Louis
  • A. Pamies
Papers

Abstract

This paper discusses the results of several experiments designed to further illustrate the recent findings of the present authors according to which, if a virtually leak-fee maximum bubble pressure system is used to measure the surface tension of liquid aluminium, a surface tension around 1100 mJ m−2 is first obtained, decreasing to the oxidized value (around 865 mJ m−2) as the experiment proceeds and oxygen enters the system mainly through the capillary walls. The peculiarities and difficulties inherent to the maximum bubble pressure method are illustrated. For instance, a study of the time needed for the surface tension to decrease to the oxidized value as a function of temperature reveals the important role played by the vapour pressure in the process. This is further illustrated by considering Al-Mg alloys, as magnesium has a different heat of vaporization and a much larger vapour pressure than aluminium at the measuring temperatures. Results for the changes in density and surface tension for the oxidized and unoxidized cases induced by magnesium (up to 8 wt%) are also presented and compared to previous data.

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Copyright information

© Chapman and Hall Ltd. 1986

Authors and Affiliations

  • C. Garcia-Cordovilla
    • 1
  • E. Louis
    • 1
    • 2
  • A. Pamies
    • 1
  1. 1.Centro de Investigacón y DesarrolloEmpresa Nacional del AluminoAlicanteSpain
  2. 2.Departamento de FisicaUniversidad de AlicanteAlicanteSpain

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