Absorption de l'hydrogène par des monocristaux de palladium

Abstract

The majority of the very numerous researches on the adsorption of hydrogen by palladium, whether by electrolytic charging or from the gas phase, have been carried out with polycrystalline palladium. Recently Sugeno and Kawabe have used single crystals measuring several mm as cathodes, so as to study the deformation of the crystal lattice. Incomplete researches, begun with Kooy, using single crystals of diameter 0.5–5 mm and several cm long, show that the single crystal lattice after transformation into the β phase (PdH 0,6) is changed into a quasi-mosaic crystal with a range of several degrees in orientation. This structure remains after the hydrogen is evolved. Photomicrographs of a face of a single crystal cut parallel to {100} show, in the β state, fracture lines (rifts) or glide lines parallel to the intersections of the {111} planes with the cut face, in agreement with the results of Sugeno and Kawabe.