Regensburg 2016 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 28: Thin Film Applications

DS 28.1: Hauptvortrag

Mittwoch, 9. März 2016, 09:30–10:00, H8

Surface analytics with electron spectroscopy on coated steel sheets — •David Stifter — Christian Doppler Laboratory for microscopic and spectroscopic material characterisation, Zentrum für Oberflächen- und Nanoanalytik, Johannes Kepler Universität Linz, Altenberger Straße 69, A-4040 Linz, Austria

Modern steel industry faces the challenge to provide new innovative materials and products with properties which fulfill the requirements of the market, especially including aspects related to high strength, light weight, reliable galvanizability, increased corrosion resistance and aesthetics. Phenomena like surface segregation of alloying elements, formation of oxide layers and corrosion products as well as gradient formation within organic top coatings call for advanced analytical studies of the developed materials down to the nanoscale.

In this contribution X-ray photoelectron spectroscopy (XPS), Auger electron spectroscopy (AES) and reflection electron energy loss spectroscopy (REELS) will be shown to provide as surface sensitive analytical methods valuable insight for understanding the structure and processes occurring on the surfaces and interfaces of modern coated steel materials. In this context it will be underlined in detail that utmost care has to be taken in the investigation of such uncooperative surfaces, which exhibit a highly complex and heterogeneous nature. Adverse effects - related to differential charging or material degradation of partly unstable compounds formed on the surfaces - have to be carefully taken into account to perform accurate surface analytics.