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WA Roshen 《Canadian Metallurgical Quarterly》1985,31(11):7296-7305
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Magnesium activities in liquid magnesium-lead alloys have been measured with electromotive force cells over the temperature range 745 to 868 K and over the mole fraction range 0.03 <X Mg<0.50. The exper imental data were used to evaluate the parameters in the empirical temperature-composition relationship proposed by Krupkowski for describing the activity coefficients. Values generated from the Krupkowski formulae were utilized with data for liquidus compositions to evaluate the free energies of formation of the solid intermediate phases and compared with available experimental data for Mg2Pb. 相似文献
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A. V. Blinder S. P. Gordienko É. V. Marek V. B. Muratov 《Powder Metallurgy and Metal Ceramics》1997,36(7-8):409-412
The temperature dependence of the heat capacity of CaB6 in the range 20–2500 K was calculated. The calculated results were confirmed by experimental measurements in the range 198–673
K, and standard enthalpy and entropy values were calculated. A recommended standard enthalpy of formation of CaB6 was obtained from data in the literature. Equations for the thermodynamic functions of CaB6 in the range 298.15–2500 K were obtained, which are suitable for the thermodynamic analysis of processes involving calcium
hexaboride.
Institute for Materials Science Problems, Ukrainian Academy of Sciences, Kiev. Translated from Poroshkovaya Metallurgiya,
Nos. 7–8, pp. 63–66, July–August, 1997. 相似文献
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We have determined the Gibbs energy, the enthalpy, and the entropy of formation for the compounds ScCu4, ScCu2, and ScCu by measuring the emf of galvanic cells in the temperature range 845–980 K. We compared the experimental results
obtained with known literature data.
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Translated from Poroshkovaya Metallurgiya, Nos. 1–2(447), pp. 87–91, January–February, 2006. 相似文献
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An approximate generalized equation is obtained for the temperature dependence of the change in Gibbs energy in the atomization of condensed silicides; this equation takes account of the number of atoms present in the silicides and their calculated boiling points. For the 16 silicides considered, the discrepancy between the maximum calculated value and the mean is no more than 10%. On that basis, the proposed method may be used to verify data from other sources and also for approximate prediction of the thermodynamic properties of silicides that have not yet been studied. 相似文献
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R. I. Polotskaya V. R. Sidorko R. V. Antonchenko 《Powder Metallurgy and Metal Ceramics》1996,35(5-6):307-310
We have determined the Gibbs free energy, enthalpy, and entropy of formation for yttrium germanides by measuring the emf of high-temperature galvanic cells at 820–920 KInstitute of Materials Science, Ukrainian Academy of Sciences, Kiev. Translated from Poroshkovaya Metallurgiya, Nos. 5–6, pp. 103–107, May-June, 1996. Original article submitted July 13, 1994. 相似文献
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Conclusions A method involving measuring the emf's of the electrolytic cells (–) Crs ¦KCl-NaCl-LiCl+CrCl2¦[Cr-Sb]s (+) was used to determine some thermodynamic characteristics (isobaric-isothermal potentials, heats, and entropies of formation) of the chromium antimonides CrSb and CrSb2.Translated from Poroshkovaya Metallurgiya, No. 4 (124), pp. 55–58, April, 1973. 相似文献
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V. N. Eremenko G. M. Lukashenko V. R. Sidorko A. M. Khar'kova 《Powder Metallurgy and Metal Ceramics》1972,11(7):563-567
Conclusions The method of measuring the emf's of high-temperature galvanic cells was employed for determining the isobaric-isothermal potentials, entropies, and heats of formation of the chromium silicides CrSi2, CrSi, Cr5Si3, and Cr3Si in the temperature range 700–850°C. Using literature data upon the enthalpies and entropies of the chromium silicides and pure chromium and silicon, the standard heats and entropies of formation of these silicides were calculated.Translated from Poroshkovaya Metallurgiya, No. 7 (115), pp. 61–65, July, 1972. 相似文献
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V. N. Eremenko G. M. Lukashenko V. P. Sidorko 《Powder Metallurgy and Metal Ceramics》1965,4(9):765-767
Summary The free energies, heats, and entropies of formation of the manganese suicides between 950 and 1100°K were measured by means of the emf method. 相似文献
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All available literature data on the thermodynamic properties of Mn-Si alloys are analyzed. Optimized concentration dependences of the thermodynamic functions of mixing are obtained. 相似文献
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