Thermochemistry of liquid alloys of transition metals II. (Copper + titanium) at 1372 K
1981; Elsevier BV; Volume: 13; Issue: 8 Linguagem: Inglês
10.1016/0021-9614(81)90059-8
ISSN1096-3626
AutoresHarumi Yokokawa, O. J. Kleppa,
Tópico(s)nanoparticles nucleation surface interactions
ResumoThe enthalpies of mixing of solid titanium with liquid copper have been measured at 1372 K by high-temperature reaction calorimetry. The enthalpies of mixing, referred to the pure liquid components, have been calculated using literature values for the enthalpy of fusion and for the heat capacities of solid and liquid titanium. In this way the limiting partial enthalpy of solution of undercooled liquid Ti in liquid Cu at 1372 K is found to be − 7.65 kJ mol−1. We have found a well-defined minimum in the enthalpy interaction parameter, ΔHmix1+lx(1 - x), near x(Ti) = 0.5, which indicates some tendency toward chemical short-range order. The results have been compared with estimates derived from phase-diagram information, and from Miedema's theory. The agreement with the phase-diagram estimates is very good. However, our results differ significantly from the Miedema predictions.
Referência(s)