Thermodynamic evaluation of the Ga-Y system

被引：9

作者：

Idbenali, M. ^{[1
]}

Servant, C. ^{[2
]}

机构：

[1] Acad Massa Daraa, Ctr Pedag Reg, Agadir, Morocco

[2] Univ Paris 11, Lab Phys Chim Etat Solide, ICMMO, F-91405 Orsay, France

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2013年 / 112卷 / 01期

关键词：

Thermodynamic evaluation of Ga-Y system; Calphad method; Redlich-Kister and Kaptay equations; Phase diagram; RARE-EARTH METALS; STANDARD ENTHALPIES; TEMPERATURE; GALLIDES;

D O I：

10.1007/s10973-012-2861-x

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The thermodynamic modeling of the gallium-yttrium binary system was carried out with the help of the CALPHAD (CALculation of PHAse Diagram) method. Ga2Y, GaY, and the three polytypes Ga3Y5 have been treated as stoichiometric compounds while a solution model has been used for the description of the liquid phase and the (Ga) and (Y) solid solutions. The excess term of the Gibbs energy of the solution phases was assessed with the recent exponential temperature dependence of the interaction energies by Kaptay (Calphad 28-2:115-24, 1; Calphad 32-2:338-52, 2; Mat Sci Eng A 495:19-26, 3) and compared with the Redlich-Kister (Ind Eng Chem. 4;40:345) polynomial equation results. The calculations based on the thermodynamic modeling are in good agreement with the phase diagram data and experimental thermodynamic values available in the literature.

引用

页码：245 / 253

页数：9

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