Lattice defects induced by the hydriding of pure Pd were studied by means of positron lifetime spectroscopy. Component analyses of the positron lifetime spectra showed that surprising numbers of vacancies, together with dislocations, were generated by hydriding at room temperature. Vacancy migration in pure Pd after hydriding was observed at around 378K. Dislocations were much more stable and their migration was observed at around 873K. During the vacancy recovery process, secondary defects (dislocation loops) were formed.

Hydrogen-Induced Vacancy Generation Phenomenon in Pure Pd. K.Sakaki, T.Yamada, M.Mizuno, H.Araki, Y.Shirai: Materials Transactions, 2002, 43[11], 2652-5