Internal friction of amorphous Zr65Al7.5Cu27.5-films

Using a vibrating reed device with micro structurized Si reeds the dynamic mechanical properties Young's modulus and damping of thin films deposited on the reeds are measured simultaneously with the curvature of the specimen. The curvature yields the internal stress of the film. As an example, measurements on amorphous Zr65Al7.5Cu27.5-films are shown and compared with measurements on amorphous splat cooled specimen of the same composition. A pronounced damping peak in the thin films is observed slightly below room temperature which is attributed to hydrogen relaxation jumps.