Influence of iron additives on the heat capacity and thermodynamic properties of A6 aluminum
https://doi.org/10.34680/2076-8052.2025.3(141).442-454
Abstract
Under strictly controlled thermostatting conditions, a detailed analysis was carried out to examine the influence of temperature on the specific heat capacity, as well as to assess the transformations of key thermodynamic functions of the A6 aluminum alloy alloyed with iron. The experiments were performed over a wide temperature range from 300 to 800 K. It was shown that heating the sample within these limits results in a regular increase in such characteristics as heat capacity, enthalpy, and entropy of the investigated material. At the same time, a systematic decrease in Gibbs free energy was observed, which is clear evidence of a reduction in the amount of free energy in the system. It was further established that an increase in the concentration of iron in the chemical composition of the aluminum alloy initiates the development of the opposite effect. In this case, an inverse dependence was recorded: as the mass fraction of iron increases, the specific heat capacity, enthalpy, and entropy of the samples begin to decrease.
About the Authors
A. G. Safarov
S. U. Umarov Physical–Technical Institute of the National Academy of Sciences of Tajikistan
Tajikistan
Tajikistan
Dushanbe
G. K. Bekseitova
S. U. Umarov Physical–Technical Institute of the National Academy of Sciences of Tajikistan
Tajikistan
Tajikistan
Dushanbe
I. N. Ganiev
V. I. Nikitin Chemistry Institute of the Tajikistan Academy of Sciences
Tajikistan
Tajikistan
Dushanbe
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Review
For citations:
Safarov A.G., Bekseitova G.K., Ganiev I.N. Influence of iron additives on the heat capacity and thermodynamic properties of A6 aluminum. Vestnik of Novgorod State University. 2025;(3(141)):442-454. (In Russ.) https://doi.org/10.34680/2076-8052.2025.3(141).442-454
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