Regensburg 2013 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 36: Poster Session II (Organic films and electronics, photoorganics; Nanostructures; Plasmonics and nanooptics, Surface chemical reactions and heterogeneous catalysis, Surface dynamics )

O 36.66: Poster

Dienstag, 12. März 2013, 18:15–21:45, Poster B2

Microscopic and spectroscopic studies of epoxy-steel interfaces — •Henning Munkert¹, Lienhard Wegewitz^1,2, Florian Voigts³, Heinz Palkowski^2,4, and Wolfgang Maus-Friedrichs^1,2 — ¹Institut für Energieforschung und Physikalische Technologien, TU Clausthal — ²Clausthaler Zentrum für Materialtechnik, TU Clausthal — ³Institut für Elektrochemie, TU Clausthal — ⁴Institut für Metallurgie, TU Clausthal

Deformable sandwich sheet materials produced as raw materials and formed afterwards to complex geometries require a good bonding to guarantee a stable shear transfer between the single layers. However, due to the deformation, failures by delamination often occur between the epoxy and the metal. The aim of our work is to understand the basic effect of the interfaces’ bonding behavior in selected preparation steps of the system. It is shown how surfaces change topographically as well as in their chemical composition, if epoxy and steel layers get into contact with each other: The interaction between the two materials results in various functional carbon groups like C-C, C-O and C=O and in the reduction of iron according to the different preparation steps. These effects are studied with Atomic Force Microscopy (AFM) and X-ray Photoelectron Spectroscopy (XPS).