Abstract
The empirical equation, based on electronegativities and atomic sizes of constituent elements, for the estimation of the thermodynamic stability of hydride of AB5-type alloys was proposed. The equation can estimate the plateau pressure of PC isotherms with a reliability higher than 99.8%. Moreover, it is found that the deviation of plateau pressure from the estimated value describes the phase segregation in alloy morphology. In this research the dissolution behaviors of alloys in a KOH solution were also discussed in relation to the phase segregation.
