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Thermodynamic study of phase equilibria in the Pb-Sn-Sb system 总被引:2,自引:0,他引:2
A thermodynamic analysis of the phase equilibria in the Pb-Sn-Sb ternary system was conducted. A regular solution approximation
based on a two-sublattice model was adopted to describe the Gibbs energy of formation of the individual phases in the binary
and ternary systems. In the case of some component binary systems, the effect of pressure also was considered. Experimental
data obtained by differential thermal analysis (DTA) and electron probe microanalysis (EPMA) in the present study, along with
literature data on phase boundaries and thermochemical properties, form the basis for the evaluated thermodynamic parameters
used in the calculation. Calculated and experimental phase boundaries agree fairly well.
Present address: Kawasaki Steel Corporation, Chiba 260, Japan. 相似文献
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An extensive investigation on the Fe-Ti-Y system was performed via experimental measurement and thermodynamic calculation. The Fe-Ti-Y ternary couples at 1 273 K were prepared with a desire to provide accurate phase relationships needed for the refinement of this ternary phase diagram. And a tentative isothermal section of Fe-Ti-Y at 1 273 K was built based on the experimental information. In the thermodynamic modeling, the thermodynamic parameters for the Ti-Y binary system and the ternary phase in the Fe-Ti-Y system were evaluated. Those for the Fe-Ti and Fe-Y systems from literature were slightly modified for the compatibility. The isothermal sections of Fe-Ti-Y ternary system at 873 K and 1 273 K were calculated. The ternary compound Fe11TiY and Fe2(Ti, Y) solid solution formed from Fe2Ti and Fe2Y are detected, which is in good agreement with the literature information. 相似文献
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A thermodynamic assessment of the Al-Cu-Mg ternary system 总被引:3,自引:0,他引:3
T. Buhler S. G. Fries P. J. Spencer H. L. Lukas 《Journal of Phase Equilibria and Diffusion》1998,19(4):317-329
A thermodynamic assessment of the Al-Cu-Mg ternary system is presented. The Gibbs energies for the liquid and solid solution
phases were modeled using the Redlich-Kister polynomial and the Wagner-Schottky model represented by the compound-energy formalism.
The model parameters were obtained after fitting to previously critically assessed experimental phase diagram and thermodynamic
data available in the literature. The thermodynamic functions and phase diagram calculated using the model parameters describe
quite well the known experimental information. The complete set of Gibbs energies for all phases appearing in this system
enables the calculation of thermodynamic values as a function of composition and temperature even for those ranges where no
experimental information is available. 相似文献
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A thermodynamic assessment of the Ag-Au-Sb ternary system has been carried out using the CALPHAD method based on new thermodynamic
and phase equilibria data that we have recently determined. The Ag-Sb binary system has also been reoptimized. The calculated
phase diagram and thermodynamic properties of the ternary system Ag-Au-Sb show satisfactory general agreement with the experimental
data. The liquidus projection and monovariant valleys of the ternary system are well reproduced by the optimized thermodynamic
model parameters. Additional experiments to confirm the proposed reaction scheme, which involves two ternary transition peritectic
reactions, are suggested. 相似文献
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Dong Wang Jianhua Zhu Shangheng Wang Hongtao Chen Xingjun Liu Cuiping Wang 《Journal of Phase Equilibria and Diffusion》2018,39(3):324-343
The phase equilibria of the Mg-Pb-Sn ternary system were investigated using a combined method of electron probe microanalyzer and x-ray diffraction. Three isothermal sections of the Mg-Pb-Sn ternary system at 200, 300 and 400 °C were experimentally established. The phase equilibria of Mg-Pb-Sn ternary system were thermodynamically assessed by using CALPHAD (Calculation of Phase Diagrams) method on the basis of the presently determined experimental data. A consistent set of thermodynamic parameters has been derived for describing the Gibbs free energies of each solution phase and intermetallic compound in the Mg-Pb-Sn ternary system. The calculated phase diagrams and thermodynamic properties in the Mg-Pb-Sn ternary system are in good agreement with experimental data. 相似文献
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D. G. Kevorkov J. Gr?bner R. Schmid-Fetzer V. V. Pavlyuk G. S. Dmytriv O. I. Bodak 《Journal of Phase Equilibria and Diffusion》2001,22(1):34-42
The binary Gd-Li and the ternary Gd-Li-Mg systems were studied experimentally by thermal analysis and phase equilibration
and also by thermodynamic calculations using the CALPHAD method. Ternary phase equilibria at 250 °C were studied with 55 different
alloys that were annealed for 400 h and analyzed by x-ray diffractometry. A thermodynamic assessment of the binary Gd-Li system
was also performed and the calculated phase diagram is presented. In the Gd-Li-Mg system, ternary solubilities of Li in GdMg
(up to 5 at.% Li), GdMg2 (up to approximately 3 at.% Li), and GdMg3 (up to 5 at.% Li) were found at 250 °C. No ternary compound was observed. Lattice parameters for different compositions are
given for these phases. Thermal analysis using a ternary key sample of composition near the invariant reaction L′=L+(βGd)+GdMg provided the data that were needed to determine a thermodynamic parameter for the ternary liquid. Thermodynamic data
sets for the ternary solid solution phases were also developed. Based on the present data sets and those of the binary Gd-Mg
and Li-Mg systems from the literature, the phase equilibria in the entire ternary system were calculated. Isothermal and vertical
sections of the phase diagram and the projection of the liquidus surface are shown. These calculated phase diagrams are well
supported by the experimental data. 相似文献
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D. G. Kevorkov J. Gröbner R. Schmid-Fetzer V. V. Pavlyuk G. S. Dmytriv O. I. Bodak 《Journal of Phase Equilibria》2001,22(1):34-42
The binary Gd-Li and the ternary Gd-Li-Mg systems were studied experimentally by thermal analysis and phase equilibration and also by thermodynamic calculations using the CALPHAD method. Ternary phase equilibria at 250 °C were studied with 55 different alloys that were annealed for 400 h and analyzed by x-ray diffractometry. A thermodynamic assessment of the binary Gd-Li system was also performed and the calculated phase diagram is presented. In the Gd-Li-Mg system, ternary solubilities of Li in GdMg (up to 5 at.% Li), GdMg2 (up to approximately 3 at.% Li), and GdMg3 (up to 5 at.% Li) were found at 250 °C. No ternary compound was observed. Lattice parameters for different compositions are given for these phases. Thermal analysis using a ternary key sample of composition near the invariant reaction L′=L+(βGd)+GdMg provided the data that were needed to determine a thermodynamic parameter for the ternary liquid. Thermodynamic data sets for the ternary solid solution phases were also developed. Based on the present data sets and those of the binary Gd-Mg and Li-Mg systems from the literature, the phase equilibria in the entire ternary system were calculated. Isothermal and vertical sections of the phase diagram and the projection of the liquidus surface are shown. These calculated phase diagrams are well supported by the experimental data. 相似文献
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Dragan Manasijevi Jan Vel Duko Mini Ale Kroupa Dragana
ivkovi
ivan
ivkovi 《Journal of Alloys and Compounds》2008,450(1-2):193-199
Phase equilibria in the In–Sb–Sn ternary system have been studied experimentally and calculated by the CALPHAD method. Solubility of indium in the SbSn phase was experimentally established. Our own SEM–EDX results were used together with the literature data for thermodynamic modeling of the Gibbs energy of the SbSn intermediate phase. Optimized phase diagrams of the isothermal sections at 100 °C and 300 °C were compared with the experimental results from this work and literature. Three calculated vertical sections were compared with the DTA results from this work and with available thermal analysis data reported in the literature. Some calculated thermodynamic functions are compared with experimental values reported in the literature. Reasonable agreement between calculations and experimental data was observed in all cases. 相似文献