Computation of thermodynamic parameters of binary metal systems with limited solubility of components in the solid α-phase

• Date: 2020
• Main Authors: Shcherban, A.P., Datsenko, O.A.
• Format: Article
• Language: English
• Published: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2020
• Series: Вопросы атомной науки и техники
• Subjects: Pure materials and the vacuum technologies
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/194340
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Computation of thermodynamic parameters of binary metal systems with limited solubility of components in the solid α-phase/ A.P. Shcherban, O.A. Datsenko // Problems of Atomic Science and Technology. — 2020. — № 1. — С. 21-26. — Бібліогр.: 7 назв. — англ.

In the region of the primary solid α-phase for systems with limited solubility thermodynamic quantities such as the partial enthalpy of dissolution Δ HαB, the activity coefficients γαB and the activities ααB in binary metal systems were calculated. The above-mentioned indicated values were determined from the relations that connect these parameters with the equilibrium distribution coefficient k0B and known thermodynamic quantities, such as the enthalpy variation ΔHплВ and entropy variation ΔSплВ during melting of component B. The calculation of equilibrium distribution coefficients using data from experimentally constructed solidus and liquidus lines of state diagrams was performed. The values and temperature dependences of the dissolution enthalpy for such systems as Ag–Mg, Nb–Ge, Mg–Al, Mg–Ag, Al–Mg, Ni–Ga, as well as the values and dependences of the activity coefficients γαB and activities ααB of the second component on these systems were determined.