Binary Metallurgical Systems

Teatum, E.T., Gschneidner Jr., K.A., and Waber, J.T. (1968) Compilation of Calculated Data Useful in Predicting Metallurgical Behavior of the Elements in Binary Alloy Systems, Report LA-4003, UC-25, Metals, Ceramics and Materials, TID-4500 (Los Alamos Scientific Laboratory, New Mexico, USA). 

Figure 2.3 Free energy of mixing curves for solid and liquid phases at various temperatures (a-e) and resulting temperature-composition phase diagram for a completely soluble binary component system (f). From O. F. Devereux, Topics in Metallurgical Thermodynamics. Copyright 1983 by John Wiley Sons, hic. This material is used by permission of John Wiley Sons, Inc.

It is possible in many cases to predict highly accurate phase equihbria in multi-component systems by extrapolation. Experience has shown extrapolation of assessed (n — 1) data into an nth order system works well for n < 4, at least with metallurgical systems. Thus, the assessment of unary and binary systems is especially critical in the CALPHAD method. A thermodynamic assessment involves the optimization of aU the parameters in the thermodynamic description of a system, so that it reproduces the most accurate experimental phase diagram available. Even with experimental determinations of phase diagrams, one has to sample compositions at sufficiently small intervals to ensure accurate reflection of the phase boundaries. 

E.Teatum, K.Gschneider and J.Waber in Compilation of calculated data useful for predicting metallurgical behaviour of elements in binary alloy systems, Lx)s Alamos Scientific Laboratory (1960). 

Many metal phosphides have properties in common with the binary compounds formed by metals with B, C, N and Si (which are themselves sometimes involved in metallurgical systems). 

Teatum, E.T., K.A. Gschneidner, Jr. and J.T. Waber, 1968, Compilation of calculated data useful in predicting metallurgical behavior of the elements in binary alloy systems, LA-4003, Los Alamos Scientific Laboratory, Los Alamos, NM (December 24, 1968). 

T he determination of the activity coefficient of an electrolyte in binary mixtures of another electrolyte with a common ion has prompted considerable interest, both in the development of the underlying theory, as well as precise experimental measurements. This kind of study is useful in applications that involve metallurgical and biological systems. The ion interaction parameters (doublet and triplet, among others) responsible for an understanding of the effects of cation size on the thermodynamic... 

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