Thermophysical properties and thermodynamic functions of aluminum conductor alloy E-AlMgSi (aldrey) doped with thallium

At present, aluminum and its alloys are successfully replacing metals and alloys traditionally used in a number of areas. One of the promising areas of aluminum use is the electrical engineering industry. Thus, the conductive aluminum alloy of the E-AlMgSi (Aldrey) type is characterized by high strength and good ductility. With appropriate heat treatment, this alloy acquires high electrical conductivity. Wires made from it are used almost exclusively for overhead power lines. The article presents the results of a study of the temperature dependence of the heat capacity, heat transfer coefficient and thermodynamic functions of the aluminum alloy E-AlMgSi (Aldrey) with thallium. The studies were carried out in the “cooling” mode. It is shown that with increasing temperature, the values of the heat capacity, heat transfer coefficient, enthalpy and entropy of the E-AlMgSi (Aldrey) alloy with thallium increase, and the value of the Gibbs energy decreases. With the addition of thallium up to 1 wt. % decreases the heat capacity, heat transfer coefficient, enthalpy and entropy of the initial alloy and increases the Gibbs energy.

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