Berlin 2005 – wissenschaftliches Programm

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M: Metallphysik

M 50: Grenzfl
ächen II

M 50.5: Vortrag

Dienstag, 8. März 2005, 17:30–17:45, TU H2038

Determination of adhesion energies by using hydrogen loading. — •Eugen Nikitin, Astrid Pundt, and Reiner Kirchheim — Institut für Materialphysik, Friedrich-Hund-Platz 1, D-37077 Göttingen

Hydrogen loading of thin films leads to large mechanical stress that increases with hydrogen concentration. That results in local film detachment and buckling above a critical stress. The critical stress depends on the material as well as on the film thickness. It can be used as a measure for the adhesion energy between the film and the substrate [1]. A simple model will be presented to calculate the adhesion energy from critical stress data [2]. Adhesion energies of different metals are measured for the metal/polycarbonate interface. This work is financially supported by the DFG via grant Ki 230/30-1. [1] A. Pundt, P. Pekarski, Scr. Mat. 48 (2003) 419. [2] A. Pundt, E. Nikitin, P. Pekarsky, R. Kirchheim, Acta Mat. 52 (2004) 1579.