Chair of Materials and Surface Engineering
Materials and Surface Engineering
Chair of Materials and Surface Engineering 

International doctoral project successfully completed


Dr Mehri Hashemzadeh worked on large parts of her practical results on her doctoral topic at the WOT professorship between April 2021 and October 2022. Her doctorate on the topic of „Ti incorporation in PEO coatings applied on Al7075 and evaluation of its effects on microstructure and properties of the coatings” has now been awarded by the supervising university, the Isfahan University of Technology, Isfahan/Iran, with an excellent evaluation. Dr Hashemzadeh is now starting his professional life in Germany.

Dr Hashemzadeh's work on „Ti incorporation in PEO coatings applied on Al7075 and evaluation of its effects on microstructure and properties of the coatings” made a major contribution to the further exploitation of plasma electrolytic oxidation (PEO). PEO is a cost-effective and environmentally friendly surface transformation process to provide light metals, especially aluminium and its alloys, with an electrolytically generated ceramic protective layer. The surface hardness, wear resistance and corrosion resistance are significantly improved compared to the untreated material. By applying a high voltage, spark discharges occur on the treated surface in the electrolytic process during PEO and lead to various electrochemical and plasma chemical reactions. The PEO processing parameters, including the electrical parameters such as the type and magnitude of the applied current density, frequency, duty cycle and also the electrolyte composition, have a complex influence on the properties of the PEO coating. These have been studied systematically and in detail by Dr Hashemzadeh. Her latest publication on the subject can be found at https://www.mdpi.com/2079-6412/12/1/33/pdf . Further publications together with WOT are being prepared.

Picture: Dr Mehri Hashemzadeh (centre) receives a memento of her doctoral period at the IWW from Prof. Thomas Lampke (2nd from left), Dr Hashemzadeh's supervisor, and the other team of professors at the IWW (from left) Prof. Martin Wagner, Prof. Guntram Wagner and Prof. Andreas Undisz.

15.11.2022 – Personnel of the professorship ( )

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