Dresden 2011 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 31: Postersitzung II
MM 31.34: Poster
Mittwoch, 16. März 2011, 17:15–18:45, P5
Influence of magnetic gradient fields on the electrodeposition of metallic layers — •Kristina Tschulik1,2, Franziska Karnbach1, Ralph Süptitz1,2, Margitta Uhlemann1, Annett Gebert1, and Ludwig Schultz1,2 — 1IFW Dresden, Germany — 2TU Dresden, Germany
With regard to surface finishing electroplating from aqueous solutions is a very common method. It is well-known, that by superposition of homogeneous magnetic fields the deposition process as well as morphology, texture and magnetic properties of deposits can be changed due to Lorentz force induced convection. Additionally, it has been shown that non-homogeneous magnetic fields are able to increase deposition rates dramatically due to the Magnetic field gradient force acting on paramagnetic ions. However, effects of magnetic gradient fields on deposit properties are still not well investigated, although interesting results due to interaction of Lorentz force and Magnetic field gradient force might be expected.
Hence, this work is focused on externally applied, well-defined magnetic gradient fields and their impact on deposition behavior and deposit properties. It has been found that structured deposits and significant diversification of roughness and grain structure can be observed. Effects of the involved magnetic forces are considered in order to propose a structuring mechanism, which bases on magnetically induced local convection.