Effect of oxygen adsorption on surface tension of liquid copper: Experiments and thermodynamic models

Majid Abbasi, Joonho Lee, Minsoo Shin, Yunkyum Kim, Youngjo Kang

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

The effect of oxygen adsorption on surface tension of liquid copper at two different temperatures (1390 and 1440 K) has been investigated. A combination of specially designed crucibles, He-Ne laser, and high-resolution photography in a highly controlled gas atmosphere was used for accurate measurements. Experimental data exhibits decreasing surface tension with increasing oxygen partial pressure. Discussion on the adsorption behavior of oxygen is presented based on thermodynamic models by assuming a hypothetical binary system of Cu-"Cu2O", in which "Cu2O" is considered as an associate molecule. Ideal adsorption model which assumes insignificant interactions between Cu and Cu2O on the surface exhibits the best fit to the experimental results.

Original languageEnglish
Pages (from-to)116-122
Number of pages7
JournalApplied Surface Science
Volume313
DOIs
Publication statusPublished - 2014 Sept 15

Bibliographical note

Funding Information:
The current research was supported by the Space Core Technology Development Program (NRF-2012M1A3A3A02033446) and the Converging Research Center Program (2013K000309) thorough the Korea. MA was supported by a Korea University Grant. We are thankful to Prof. M. Watanabe, Gakushuin University, Prof. S. Ozawa, Chiba Institute of Technology, and Dr. J. Brillo, DLR for their useful discussions.

Keywords

  • Brazing
  • Copper
  • Oxygen adsorption
  • Surface tension
  • Thermodynamics

ASJC Scopus subject areas

  • General Chemistry
  • Condensed Matter Physics
  • General Physics and Astronomy
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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