An analytic equation of state based on analytic mean-field potential approach and application to three phases of metallic Zirconium |
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Authors: | Ronggang Tian Jiuxun Sun Wei Yang Xinying Xue Fei Yu |
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Institution: | (1) Department of Applied Physics, University of Electronic Science and Technology of China, Chengdu, 610054, People’s Republic of China |
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Abstract: | The analytic mean-field approach (AMFP) was applied to study the thermodynamic properties of Zirconium (Zr). The analytic
expressions for the Helmholtz free energy, internal energy and equation of state have been derived. The formalism for the
case of the Morse potential is used in this work. The four potential parameters are determined by fitting the molar volume
of the three phases of Zr. The calculated molar volume of α, β and ω Zr are in fairly good agreement with the available experimental data. The results presented in this paper verify that the
AMFP is a useful approach to study the thermodynamic properties of Zr. Furthermore, we predict the variation of the relationship
of free energy and internal energy versus the molar volume at various temperatures and the dependence of the bulk modulus,
the thermal expansion coefficient and the heat capacity on temperature at zero pressure of α, β and ω Zr.
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Keywords: | equations-of-state thermodynamic properties Zirconium analytic mean-field approach |
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