Regensburg 2010 – scientific programme
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MA: Fachverband Magnetismus
MA 10: Poster I
MA 10.80: Poster
Tuesday, March 23, 2010, 10:45–13:45, Poster A
Investigation of depletion state of high temperature protective coatings — •Iulian Teliban1, Claas Thede1, Steffen Chemnitz1, Christoph Bechtold1, Thomas Hüttel2, Krasimir Aleksandrov3, Willem Quadakkers2, Michael Schütze3, and Eckhard Quandt1 — 1Christian-Albrechts-Universität zu Kiel — 2Forschungszentrum Jülich — 3DECHEMA, Frankfurt a.M.
In many industrial applications metallic and non-metallic protective coatings are applied to protect against oxidation, corrosion or physical degradation. To date, practical non-destructive methods for the measurement of the depletion state of the coating during the operation time do not exist. By integration of magnetic phases into the coating and measuring the magnitude of the magnetic properties important information about the coating’s condition can be provided.
A new technique using frequency mixing is presented to investigate the thickness of the coatings based on their magnetic properties. The performance of the sensor was investigated using magnetic samples with defined properties and thicknesses (Fe67Co18B14Si1 multilayers), [1]. Common protective coatings consisting of a paramagnetic MCrAlY matrix in which the sensor phase (Cr, Fe) is embedded and new types of coatings based on Al1−xCrxN (x=0.02÷0.07) are analyzed with the new technique in different stages of usage (oxidation).
Founding by the DFG via the SPP 1299 is gratefully acknowledged.
[1] I. Teliban, C. Thede, S. Chemnitz, C. Bechtold, W. J. Quadakkers, M. Schütze, and E. Quandt, Rev. Sci. Instrum. 80, 115106 (2009).
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