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 (ZrH2±x) is shown to be the last hydride formed in the Zr–H system. TiH1·38 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
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