Temperature Dependence of thermodynamic Properties of Zn-5al and Zn-55al Alloys with Magnesium

Reza Amini; Z. Nizomov; M. Razazi; I. N. Ganiev; Z. R. Obidov

Article | Open Access

Temperature Dependence of thermodynamic Properties of Zn-5al and Zn-55al Alloys with Magnesium

Reza Amini^1*, Z. Nizomov², M. Razazi¹, I. N. Ganiev³ and Z. R. Obidov³

¹Department of Mmaterial Science and Engineering, Islamic Azad University, Majlesi Branch, Isfahan (Iran). ²Department of Physics, Tajikestan National University, Dushanbe (Tajikistan). ³Chemistry Institute, Tajikistan Academy of Sciences, Dushanbe (Tajikistan).

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ABSTRACT:

According to cooling law of Newton and studied experimental results, enthalpy, entropy and energy of Gibbs of Zn-5Al and Zn-55Al alloys were achieved and special heat capacity of the alloys with Mg were studied. Experimental research showed that increasing temperature due to increase enthalpy and entropy of Zn-5Al and Zn-55Al original alloys but energy of Gibbs decreases. After 500 K, increasing temperature due to soft increasing entropy. After adding small amounts of Magnesium to the original alloy, it is observed that increasing temperature due to increase the Special heat capacity of them, but about 520-530 K, a transition is observed which is explained by recrystallization of grains.

KEYWORDS:

Zn-5Al; Zn-55Al; Magnesium; Thermodynamic Properties; Enthalpy; Entropy; Energy of Gibbs; Special Heat Capacity