Abstract

When one side of the surface-modified ZrNi amorphous alloy membranes was hydrogen charged cathodically, the membrane with Pd plating bent rapidly with an increase in the hydrogen charging time. It was also found that the bending disappears completely when hydrogen gas was released from the specimen by heating. The repetitious bending movement was identified by a combination of hydrogen absorption and desorption without any surface damages in the membrane with Pd plating. On the basis of an X-ray diffraction analysis of the specimen surfaces before and after hydrogen charging, it was shown that the absorbed hydrogen was simply solved in the specimens and did not form hydrides during the bending. The hydrogen microprint technique revealed that the hydrogen-induced bending deformation was closely related to the gradient of the hydrogen concentration in the thickness direction of the membranes. [doi:10.2320/matertrans.M2010237]

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