By Wheeler P. Davey
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Extra info for A study of crystal structure and its applications
93 Kar]. Thermodynamics Recently, Hassam et al. [94 Has] have determined by high-temperature calorimetry the enthalpies of mixing of liquid alloys at 878 K. The results are given in Fig. 1. They deviate not seriously from those published by Sommer et al. [80 Som], determined at temperatures between 800 K and 1180 K. Thermodynamic activities at 1000 K for liquid alloys have been calculated by Karakaya et al. [93 Kar]. 99 500 400 Ag Fig. 1. Ag-Bi. Bi-rich side of phase diagram Ag-Bi [93 Kar]. 2 4 6 at % Bi Landolt-Börnstein New Series IV/12A Supplement to IV/5A 8 10 Phase Equilibria, Crystallographic and Thermodynamic Data of Binary Alloys 2500 Ag-Bi -1 Entropy DH [kJ g-atom ] 2000 L 1500 1000 500 0 Ag 10 20 30 40 50 at % Bi 70 60 80 90 Bi Fig.
Of Standards, Gaithersburg, MD 20899 (1978); and “Phase Behaviour and related Properties of Rare-Earth Borides”, Refractory Materials, Vol. M. B. (Editor-in-Chief): “Binary Alloy Phase Diagrams”, second edition, The Materials Information Society, ASM International, Materials Park, Ohio (1992) Phase Equilibria, Crystallographic and Thermodynamic Data of Binary Alloys 1 Ac – Cr (Actinium – Chromium) Phase diagram Ac-Cr alloys, by splat cooling, can very easily solidify in an amorphous state [83 Gie].
For more discussion see [Hultgren]. Enthalpies of mixing of liquid alloys obtained by [95 Lim], optimizing the set of thermodynamic data present in the literature, are shown in Fig. 3. As pointed out by these authors ([95 Lim]) the scatter of experimentally determined ∆HL-values published by Kawakami [30 Kaw] and by Itagaki et al. [69 Ita] is rather high. Thus, the enthalpies of mixing shown in Fig. 3 are the more realistic ones. Thermodynamic activities aSAl for solid alloys, as calculated in the frame of optimization thermodynamic data of this system, are given in Fig.