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Binary system
About: Binary system is a research topic. Over the lifetime, 5788 publications have been published within this topic receiving 97882 citations.
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TL;DR: In this article, the CoCr binary system was experimentally re-investigated by differential thermal analysis, isothermal annealing and high temperature X-ray diffraction.
Abstract: The CoCr binary system was experimentally re-investigated by differential thermal analysis, isothermal annealing and high temperature X-ray diffraction. In the Cr-rich region, the transformation of the a phase into the b.c.c. α phase occurred at about 1280 °C, but no δ phase was found to exist at high temperature. The other parts of the diagram agree with the data selected by Hansen. The thermodynamic values were described by a polynomial representation which took into account all the published experimental thermodynamic data; the phase equilibrium was then calculated and compared with the experimental results.
71 citations
TL;DR: In this article, an overview of the excess enthalpies of binary mixture containing ionic liquid and molecular solvent is reported, taking into account the various structural features of both the ions and solvents.
Abstract: In this work, an overview of the excess enthalpies of binary mixture containing ionic liquid and molecular solvent is reported, taking into account the various structural features of both the ionic liquid and molecular solvent. Subsequently, the capability of the conductor-like screening model for real system (COSMO-RS) to predict the excess enthalpies of the binary system of ionic liquid and molecular solvent was further evaluated. In general, a good agreement between experimental excess enthalpies and COSMO-RS prediction was obtained. In addition, the COSMO-RS was able to depict and screen the type of molecular interaction that governs the excess enthalpies of ionic liquid and molecular solvent. Thus, COSMO-RS proved very useful as an a priori method that could be used as a tool in the selection or design of a suitable ionic liquid candidate for a certain task and application before extensive experimental measurement.
71 citations
TL;DR: In this article, the density of the asymmetrical binary system 1-propanol+toluene has been measured (882 points) for nine different compositions including the pure compounds at seven isotherms in the range 293.15 −353.15 K and 14 isobars up to 65 MPa with a vibrating-tube densimeter, the experimental uncertainty is estimated to be ± 0.5%.
71 citations
TL;DR: In this paper, a modified UNIQUAC model is presented to accurately reproduce binary phase equilibria and ternary and quaternary liquid-liquid equilibrium ofaqueous and organic solutions.
Abstract: A modified form of the UNIQUAC model is presented to accurately reproducebinary phase equilibria and ternary and quaternary liquid-liquid equilibria ofaqueous and organic solutions. The model gives a good representation in thereproduction of binary coexistence curves over a wide temperature range usingtemperature-dependent parameters and of binary vapor-liquid equilibria usingtwo binary energy parameters, and in the correlation of ternary and quaternaryliquid-liquid equilibria using ternary and quaternary parameters, in addition tobinary parameters. The quaternary calculated results are compared with thoseobtained from the modified Wilson and extended UNIQUAC models.
71 citations
TL;DR: In this paper, the equilibrium and stability properties of close binary systems containing polytropic components were analyzed based on the use of ellipsoidal trial functions in an energy variational principle, and the existence of global fluid instabilities can have a profound effect on the terminal evolution of coalescing binaries.
Abstract: We present a new analytic study of the equilibrium and stability properties of close binary systems containing polytropic components. Our method is based on the use of ellipsoidal trial functions in an energy variational principle. We consider both synchronized and nonsynchronized systems, constructing the compressible generalizations of the classical Darwin and Darwin-Riemann configurations. Our method can be applied to a wide variety of binary models where the stellar masses, radii, spins, entropies, and polytropic indices are all allowed to vary over wide ranges and independently for each component. We find that both secular and dynamical instabilities can develop before a Roche limit or contact is reached along a sequence of models with decreasing binary separation. High incompressibility always makes a given binary system more susceptible to these instabilities, but the dependence on the mass ratio is more complicated. As simple applications, we construct models of double degenerate systems and of low-mass main-sequence star binaries. We also discuss the orbital evoltuion of close binary systems under the combined influence of fluid viscosity and secular angular momentum losses from processes like gravitational radiation. We show that the existence of global fluid instabilities can have a profound effect on the terminal evolution of coalescing binaries. The validity of our analytic solutions is examined by means of detailed comparisons with the results of recent numerical fluid calculations in three dimensions.
71 citations