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Dresden 2014 – scientific programme

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O: Fachverband Oberflächenphysik

O 59: Metal Substrates I

O 59.2: Talk

Wednesday, April 2, 2014, 16:15–16:30, WIL A317

Annealing of oxidized aluminium alloy surfaces studied by PEEM combined with XPS — •Lisa Rullik1, Florian Bertram1, Jonas Evertsson1, Anders Mikkelsen1, Yuran Niu2, Alexei Zakharov2, and Edvin Lundgren11Div. of Synchrotron Radiation Research, Lund University, Lund, Sweden — 2MAX-lab, Lund University, Lund, Sweden

Aluminium alloys are used in a wide range of applications due to their high tensile strength in concomitance with low density. Additionally, aluminium alloys form a native passivating oxide layer, which leads to high corrosion and weathering resistance. In industrial manufacturing, aluminium alloys acquire their desired properties upon heating and welding.

Here, we present how annealing affects the surface layer composition of different aluminium alloys. Using MEM, PEEM and XPS we were able to follow the diffusion process of aluminium and its alloying elements from and towards the surface. For temperatures up to 300C only slight changes of the surface composition can be observed in PEEM images and XPS spectra. At 400C a significant diffusion of magnesium to the surface occurs.

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