Thermodynamics of the liquid Co-Cu system and calculation of phase diagram

摘要: Knudsen-cell mass spectrometric measurements have been carried out in the liquid phase of Co-Cu system concentration range 25.0 to 85.9 at. % Cu temperature 1347 1587 °C. The molar excess Gibbs energy, enthalpy and entropy mixing, as well thermodynamic activities components were determined using composition dependence ratio intensities 59Co 63Cu ions. results show that a subregular solution model would fit measured data (2-parameter thermodynamically adapted power (TAP) series: C J·mol−1; 1 =35,961, 2 =−5573.2; J·mol−1·K−1; =5.54, =−3.35). A special experiment verified solid-liquid equilibrium at 1327 °C diagram was calculated.