The Lattice Stability of Metals. IV. Transition Elements of the Second and Third Periods.

摘要

The enthalpy and entropy differences between the b.c.c., h.c.p. and f.c.c. structures were estimated for transition elements of the second and third periods. Continuous curves depicting these differences as a function of electron number in the zirconium through cadmium and hafnium through gold series are presented. The difference parameters were used to compute thirty binary phase diagrams between elements in the niobium/tantalum through palladium/platinum groups. These binary diagrams, which are restricted to cases where the end members exhibit differing stable crystal structures and miscibility gaps are absent, were calculated on the basis of ideal liquid, b.c.c., h.c.p. and f.c.c. phases. The latter simplification was chosen in order to afford the clearest possible comparison of computed and observed phase diagrams. (Author)