Étude potentiométrique des alliages liquides aluminium-étain et aluminium-tellure

Blot, J.; Rogez, J.; Castanet, R.

doi:10.1016/0022-5088(86)90611-9

Cited by 15 publications

(4 citation statements)

References 1 publication

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“…As seen in Fig. 1-6, most of calculated activities using the proposed model in the present work agree well with the experimentally measured data in binary liquid Al-Mn, Al-Sn, and Al-Mg systems, respectively [11][12][13][14][15]. However, a few calculated activities cannot completely agree with the experimentally measured data in some binary alloy systems such as Al-Fe, Fe-Cu and Fe-Si alloys.…”

Section: Reliability Examinationsupporting

confidence: 85%

Model Prediction of Thermodynamics Activity in Multicomponent Liquid Alloy

Fan

Yang

Chen

et al. 2006

KEM

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This work presents a thermodynamic model to theoretically predict the component activity in multicomponent liquid alloy based on the Wilson equation and an extended Miedema model. Using only the physical parameters of pure metals, the component activities can be theoretically calculated and the calculation results agree well with the measured data. The model should enable very useful predictions to be made for activities in multi-component liquid alloys, especially for the trend of the activity changes with increasing alloy content.

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Section: Reliability Examinationsupporting

confidence: 85%

Model Prediction of Thermodynamics Activity in Multicomponent Liquid Alloy

Fan

Yang

Chen

et al. 2006

KEM

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“…The number of studies devoted to the physicochemical study of aluminum chalcogenides in retrospect of seventy years compared to similar compounds of other metals is very small [12][13][14][15][16][17][18][19][20], and most of them are related to the aluminum-tellurium system [21][22][23][24][25][26][27][28][29][30][31][32][33][34]. The study of the Al-Se system thermodynamics is very limited in the scientific literature, and, as a rule, it takes place along with other chalcogenes such as tellurium and sulfur.…”

Section: Introductionmentioning

confidence: 99%

Melt–Vapor Phase Transition in the Aluminum–Selenium System in Vacuum

Nitsenko

Володин

Linnik

et al. 2023

Metals

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The boundaries of liquid and vapor coexistence fields at pressures of 101.3 and 0.133 kPa were calculated based on the partial vapor pressure values of the components in the Al-Al2Se3 and Al2Se3-Se partial systems. The vapor pressures of the more volatile aluminum selenide and selenium in the above systems were determined by the isothermal version of the boiling-point method. The partial pressures of the fewer volatile components were determined by numerical integration of the Gibbs–Duhem equation. The partial and integral values of the thermodynamic functions of the formation and evaporation of solutions were calculated based on the values of the partial vapor pressure of the system components. Based on the analysis of the complete phase diagram, it was found that the purification of aluminum by vacuum distillation in a single operation can remove aluminum selenide and selenium at an appropriate rate. The distillation of selenium from melts in vacuum in the whole concentration range of the Al2Se3-Se system will proceed from the mixture of the solution with Al2Se3 cryst., with accumulation of the latter in the distillation residue.

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“…When studying the pressure and composition of vapor by mass spectroscopic, static, and torsioneffusion methods [15] in the temperature range 538-760 K, it was found that the only component of the gas phase over crystalline AL2Te3 is the Te2 dimer, and the temperature dependence of the dissociation pressure ( 2Te p ) turned out to be equal where T is the temperature, K. Partial and integral thermodynamic functions of metals were determined in [16] paper, using the method of measuring the electromotive forces of concentration chains at 700 -820 K (427 -547 °C) in the range of alloy compositions of the aluminumtellurium system up to 20 atom percentte.…”

Section: Introductionmentioning

confidence: 99%

Evaporation thermodynamics and sublimation of aluminum telluride

et al. 2022

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The analysis of the researches completed by now showed the lack of information concerning the definition of quantity of the vapor pressure values over the molten and crystalline aluminum chalcogenide. In the work presented here, the saturated vapor pressure over liquid and crystalline aluminum sesquitelluride was determined for the first time by the boiling point method (isothermal version). The compound was synthesized from elements, with a purity of 99.99 wt. %, identified by X-ray phase analysis as a monophase Al2Te3 was used as a research object. Certain vapor pressure of liquid Al2Te3 corresponds to the dependence, vapor pressure over crystalline telluride is Based on the values of saturated vapor, the temperature dependence of the Gibbs free energy of evaporation and sublimation was determined, by differentiating which concerning temperature, the entropies of the condensed phase - vapor transformation were calculated, and then the enthalpy. Thermodynamic functions were as follows: entropy of evaporation of the liquid phase - 60.71 ± 4.08 J/(mol K), enthalpy - 98.65 ± 6.64 kJ/mol; entropy of sublimation of the crystalline phase - 69.37 ± 4.67 J/(mol K), enthalpy - 108.73 ± 7.31 kJ/ mol. The low value of entropy of the aluminum telluride transfer to the vapor phase indicates the presence of associates in the vapor and of the congruent character of evaporation and sublimation of Al2Te3 indirectly. Defined as the difference between the sublimation enthalpies and evaporation, the enthalpy of aluminum telluride melting was 10.08 ± 0.68 kJ/mol, the entropy calculated similarly was 8.66 ± 0.58 J/(mol K). The data obtained coincide with the thermodynamic values found by other authors by calorimetric methods.

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Étude potentiométrique des alliages liquides aluminium-étain et aluminium-tellure

Cited by 15 publications

References 1 publication

Model Prediction of Thermodynamics Activity in Multicomponent Liquid Alloy

Model Prediction of Thermodynamics Activity in Multicomponent Liquid Alloy

Melt–Vapor Phase Transition in the Aluminum–Selenium System in Vacuum

Evaporation thermodynamics and sublimation of aluminum telluride

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