THE KINETIC AND THERMODYNAMIC EFFECTS OF VACANCY-INTERSTITIAL INTERACTIONS IN PD-H SOLUTIONS

Statistical mechanical techniques have been used to calculate the effe cts of interactions between H-atoms and vacancies in Pd. Using a spect rum of H-vacancy binding energies generated by effective medium calcul ations, it has been shown that the creation of H-induced vacancies can lead to drastic increases in the diffusivity of the lattice atom, but that the effects reflected in the thermodynamic functions of the H-at oms will be less than the experimentally detectable limits. (C) 1997 A cta Metallurgica Inc.