Abstract
The effects of hydrogenation on the short-range structure have been investigated for Fe 0.67Ce 0.33(Fe 2Ce) and Fe 0.67Er 0.33(Fe 2Er) metallic glasses by means of X-ray diffraction. The radial distribution functions obtained show drastic changes on hydrogenation: the interatomic distances between rare earth-rare earth (RE-RE) atoms and the coordination numbers of RE-RE pairs increase remarkably, while those of Fe-Fe and Fe-RE pairs show a very small change. The effects of hydrogenation on the structure of metallic glasses are much greater for Fe 2Ce than for Fe 2Er. Such a distinct difference can be ascribed to the valence fluctuation effects of cerium in Fe 2Ce metallic glass.
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