Phase stability in Zr–H and Ti–H systems

Abstract

Enthalpy calculations, based on Miedema's model for alloy formation, show the δ–hydride (ZrH_~1·6) to be the most stable hydride in the Zr–H system. The γ–hydride (ZrH) is the least stable and, as suggested in the literature, is quite probably metastable. In addition, the ε–hydride (ZrH_2±x) is shown to be the last hydride formed in the Zr–H system. TiH_1·38 is shown to be the most stable hydride in the Ti–H system corresponding to the γ–hydride phase on the equilibrium phase diagram.

MST/187