Physics of the evolution of structure and elastic stresses in Pd-Mo alloys saturated with hydrogen

Specific features in the structural evolution of a Pd-Mo alloy after its electrolytic saturation with hydrogen are studied by x-ray diffraction. It is revealed that these features depend on the concentration of absorbed hydrogen, the initial defect structure, and the character of its transformation upon hydrogen saturation. The factors responsible for the structural evolution depend on the concentration of alloy components and the difference between the hydrogen affinities, Debye temperatures, and elastic constants of the components. A model proposed for the evolution of the structure and elastic stresses in palladium-metal-hydrogen systems accounts for the above factors.