Thermochemistry of ternary liquid Cu-Mg-Si alloys

Journal Article · Sat Aug 01 04:00:00 EDT 1998 · Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science

DOI:https://doi.org/10.1007/s11663-998-0139-2· OSTI ID:651075

Ganesan, V; Ipser, H ^[1]; Feufel, H; Sommer, F ^[2]

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1. Univ. Wien (Austria)
2. Max-Planck-Inst. fuer Metallforschung, Stuttgart (Germany)

The thermodynamic properties of ternary liquid Cu-Mg-Si alloys with a constant concentration ratio of x{sub Cu}/x{sub Si} = 7/3 were determined using a combination of different experimental methods. Enthalpies of mixing were measured by isoperibolic calorimetry, and magnesium vapor pressures were obtained by an isopiestic method. Partial thermodynamic properties of magnesium were derived from the vapor pressure data, and the composition dependence of the magnesium activities is given for 1,173 K. Integral Gibbs energies of mixing for liquid alloys were calculated by a Gibbs-Duhem integration. The agreement of the thermodynamic data obtained from different methods was found to be very good.

• Sponsoring Organization: USDOE
• OSTI ID: 651075
• Journal Information: Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science, Journal Name: Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science Journal Issue: 4 Vol. 29; ISSN MTBSEO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CALORIMETRY
CONCENTRATION RATIO
COPPER ALLOYS
LIQUID METALS
MAGNESIUM ALLOYS
SILICON ALLOYS
THERMODYNAMIC PROPERTIES