Thermodynamic properties and ordering in liquid NaK alloys

The long-wavelength limit of the Bhatia – Thornton structure factor "concentration – concentration" in liquid Na-K

“…Our results confirm smoothness of the dependency under consideration obtained experimentally by Caffasso et al (1967) and by Alblas et al (1980), although numerically our results lie closely to experiment of Hultgren et al (1973). …”

“…The agreement with experiments is quite satisfactory. Absolute values calculated at different concentrations better agree with experimental results of work [7], whereas the calculated curve behavior better agree with results [8,9]. of liquid Na-K at T=373K (bold full line -our result; full lineexperiment [7]; dotted line -experiment [8]; circles -experiment [9]).…”

A theoretical study of the static structure of the liquid alloy

“…The existence of homocoordination tendencies in the Na x K 1−x liquid alloy at T = 373 K, is also predicted from the thermodynamic activity measurements of Cafasso et al [11] and Hultgren et al [12]. The x-ray and neutron diffraction experiments of van der Lugt et al (see [13]), carried out for several concentrations and temperatures, also confirm the tendency towards homocoordination.…”

Thermodynamic evaluation and optimization of the (Na + K + S) system

“…The calculated eutectic point is at x(Na) = 0.328, T = 260.6 K and the calculated peritectic point is at x(Na) = 0.594, T = 280.0 K. FIGURE 9. Calculated activity of K (relative to liquid standard state) plotted as a function of mole fraction of K in the (K + Na) liquid at T = 384.15 K (a) and T = 773.15 K (b) with experimental data from [49,50] figure 11) and for a Na-K alloy with 44.80 wt% K ( figure 12). The parameters for the liquid were directly taken from Bale [48] (they are actually divided by Z/2 = 6/2 = 3.0; this is possible because of our choice of equality of Z ¼ Z Na Na 2 =Va 2 ¼ Z Na…”

“…In his assessment, Bale [48] used the experimental phase diagram points from Ott et al [29] (figure 8); hence, the same experimental points were used in the, present evaluation. The activity of K in the liquid has been measured by Lantratov [49] at T = (723.15 and 773.15) K and by Cafasso et al [50] at T = 384.15 K ( figure 9). The enthalpy of mixing of the liquid has been FIGURE 8.…”