| Autor: |
Kubišta, Jaroslav, Vřešt’ál, Jan |
| Zdroj: |
Journal of Phase Equilibria; Mar2000, Vol. 21 Issue 2, p125-129, 5p |
| Abstrakt: |
Knudsen-cell mass spectrometric measurements have been carried out in the liquid phase of the Co-Cu system in the concentration range 25.0 to 85.9 at. % Cu in the temperature range 1347 to 1587 °C. The molar excess Gibbs energy, enthalpy and entropy of mixing, as well as the thermodynamic activities of components in the liquid Co-Cu system were determined using the composition and temperature dependence of the ratio of intensities of 59Co and 63Cu ions. The results show that a subregular solution model would fit measured data well (2-parameter thermodynamically adapted power (TAP) series: C in J·mol−1; C =35,961, C =−5573.2; C in J·mol−1·K−1; C =5.54, C =−3.35). A special experiment verified solid-liquid phase equilibrium at 1327 °C and the phase diagram was calculated. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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