Mixing enthalpy, metallic liquids

Schaefers, K. Qin, J. Rosner-Kuhn, M. Frohberg, M.G. Mixing enthalpies of liquid Ni-V, Ni-Nb and Ni-Ta alloys measured by levitation alloying calorimetry. Can. Metall. Quart. 1996, 35 (1), 47. 

The entropy contents of lead chalcogenides have been measured240 at temperatures between 300 K and their melting points. Enthalpies of mixing in the liquid state (for mole fractions of chalcogen = 0.5) were calculated. These values confirm the more metallic nature of the melts with tellurium as... 

Figure 7.3. Calculated values of molar fraction of Si in liquid metal M at the three phase M/SiC/Cg equilibrium (equation 7.4) as a function of the partial enthalpy of mixing of Si at infinite dilution in M. Arrows indicate values of AH (M for some metals M given in Appendix G.

Miedema s model is an empirical theory for calculating heat of mixing in various binary systems both for the solid state (Miedema et al., 1975) and liquid (Boom et al., 1976). This model involves the calculations of the formation enthalpy of metallic glasses (amorphous... 

Pasturel et al. (1983) have introduced another simple model, one which casts the partial enthalpy of mixing at infinite R dilution, AH, in terms of the change in (, the Fermi energy, and the change in volume, with alloying. This model addresses liquid alloys of R s with non-transition metals. These authors find that their measured and calculated values of AH", for the lanthanide series of R s in liquid Al, agree rather well, and, moreover, that both show the same dependence on atomic number as does the molar volume. 

The enthalpies and entropies of formation of intermetallic compounds between transition metals and rare earth or actinide elements are reported in tables 5-15. As can be seen, data are available for late transition metals. For early transition metals some data concerning the U-Zr, U-Nb, U-Mo solid solutions have been found and are reported in table 16. When calorimetric experiments have been performed in the liquid state, the values of the partial or integral enthalpies of mixing are reported in tables 17-20. These data concern only rare-earth-based alloys with Ni, Co, Fe and Mn. 

---