[Kovove materialy - Metallic materials]
    Wed - November 13, 2024 - 20:48 No. of hits : 1798082 ISSN 1338-4252 (online) ISSN 0023-432X (printed)
© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 37 (1999), Issue 1

Mass-spectrometric determination of thermodynamic properties of liquid Co-Cr alloys
HAVRANKOVA, J., VRESTAL, J., TOMISKA, J.
vol. 37 (1999), no. 1, pp. 34 - 41

Abstract
Thermodynamic excess functions of Co-Cr alloys in the liquid phase have been investigated by Knudsen-cell mass spectrometry in the concentration range 0.272-0.605 atomic fraction (at. fr.) of Cr in the temperature range 1710-1860 K. The molar excess Gibbs energies, entropies, and enthalpies as well as the thermodynamic activities of components in the Co-Cr system were obtained using composition and temperature dependence of the ratio of intensities of 59Co and 52Cr ions. The results show that subregular solution model would fit the measured data well: (2-parameter thermodynamically adapted power (TAP) series: CHn in J/mol: CH1 = -18400, CH2 = 13000, CSn in J/(mol.K): CS1 = -2.5, CS2 = 0.2.

Key words
mass spectrometry, metals, thermodynamics, cobalt, chromium

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Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.


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