Microsecond-resolution measurements of the thermophysical properties of liquid gold

E. Kaschnitz, G. Nussbaumer, G. Pottlacher, H. Jäger

Research output: Contribution to journalArticleResearchpeer-review

Abstract

New experimental results obtained using an accurate technique for electrical and optical measurements on pulse-heated gold samples are given. An almost-constant current pulse is used for resistive self-heating of the sample over a time interval of 50 μs. Because of the high heating rate, the sample maintains its cylindrical shape in the liquid phase. High pressures are used to extend the investigated range of the liquid phase by suppressing boiling. The stability of the liquid sample is demonstrated by short-time photographs, obtained with a kerrcell camera. Measurements of current through the sample, voltage drop across the sample, surface radiation, and volume expansion allow the determination of the selected thermophysical properties. Specific enthalpy, electrical resistivity, temperature, density, and their mutual dependencies are obtained. In addition, the enthalpy of melting, as well as the specific heat capacity at constant pressure, is determined.

Original languageEnglish
Pages (from-to)251-257
Number of pages7
JournalInternational Journal of Thermophysics
Volume14
Issue number2
DOIs
Publication statusPublished - Mar 1993

Keywords

  • density
  • electrical resistivity
  • enthalpy
  • gold
  • heat capacity
  • high temperatures
  • liquid metals

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Mechanics of Materials
  • Computational Mechanics
  • Physical and Theoretical Chemistry
  • Fluid Flow and Transfer Processes

Fields of Expertise

  • Advanced Materials Science

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