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Metallurgical and Materials Transactions B

, Volume 2, Issue 11, pp 3067–3071 | Cite as

The surface tensions of Pb, Sn, and Pb-Sn alloys

  • D. W. G. White
Process Metallurgy

Abstract

The surface tensions of 99.9999 pct Pb and Sn and of alloys made from lead and tin of the same purity have been measured by the sessile-drop method. The surface tension of lead was determined from the melting point, the surface tension of tin from 200°C (32°C of supercooling) and the surface tensions of the Pb−Sn alloys from the respective liquidus temperatures, all, up to a temperature of about 560°C. Within the limits of experimental error, data for both pure metals plot in a rectilinear fashion with negative slopes, thus: γlead=472.7−0.085t(±5) dyne/cm γtin=569.0−0.080t((±5) dyne/cm The surface tensions of Pb−Sn alloys are not straight-line functions of temperature and the evidence indicates that the temperature coefficients of surface tension are slightly positive at the liquidus temperature.

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Copyright information

© The Minerals, Metals & Materials Society - ASM International - The Materials Information Society 1971

Authors and Affiliations

  • D. W. G. White
    • 1
  1. 1.Department of Energy, Mines and ResourcesOffice of Assistant Deputy Minister (Science and Technology)OttawaCanada

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