Influence of oxygen adsorption on surface tension of molten nickel measured under reducing gas atmosphere

S. Ozawa, S. Takahashi, N. Watanabe, H. Fukuyama

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The surface tension of molten nickel was measured under a reducing gas atmosphere of Ar–He–5 vol% H2 by an oscillating droplet method using electromagnetic levitation. The influence of the temperature dependence of the oxygen partial pressure of the gas on the surface tension was investigated. The surface tension of molten nickel was successfully measured over the very wide temperature range of 750 K, which included undercooling conditions. The temperature dependence of the surface tension did not exhibit a linear relationship but had a peculiar kink at around 1600 K, due to competition between the temperature dependence of the oxygen partial pressure and that of the oxygen adsorption equilibrium constant.

Original languageEnglish
Pages (from-to)1705-1711
Number of pages7
JournalInternational Journal of Thermophysics
Volume35
Issue number9-10
DOIs
Publication statusPublished - 2014 Oct

Keywords

  • Electromagnetic levitation
  • Molten nickel
  • Oscillating droplet method
  • Oxygen adsorption
  • Surface tension

ASJC Scopus subject areas

  • Condensed Matter Physics

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