Thermodynamic and thermophysical properties of Cu-Si liquid alloys
2020
The Cu-Si system is of primary interest for many industrial applications,
especially for waste applications. Due to eutectic reactions and the con-
gruent melting of intermetallic phases, these binary alloys exhibit specific
behaviors as a function of temperature and composition. A complete
investigation of the thermodynamic and thermophysical properties of such
liquid metals that may form is required to optimize such a process at the
industrial scale.
To better predict the thermophysical properties of these metallic alloys,
measurements of the surface tension are carried out for bulk mole frac-
tions of up to 32% at Si. These experiments were conducted by means of
the oscillating drop technique using the electromagnetic levitation
method [1]. To better predict the thermodynamics of such liquids during
the experiments, these tests were complemented by chemical activity cal-
culations using the Calphad method.
The experimental results obtained from the electromagnetic technique
are compared and discussed taking into consideration the Egry model [2],
the most suitable one in case of formation of high-temperature intermetal-
lic compounds.
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