Grundlegende Untersuchungen zur elektrochemischen Herstellung und zu den Struktur-Eigenschaftsbeziehungen von Nanokompositen
Zusammenfassung der Projektergebnisse
One aim of this project was to shed more light on the mechanism of electrocodeposition, i.e. the incorporation of particles into a metal matrix during an electroplating process. Such layers are called dispersion coatings and can have optimized mechanical and physical properties (hardness, wear resistance, corrosion resistance, etc.) compared to the pristine metals. Therefore the surface finishing industry is highly interested in reliable and cost-effective processes for their preparation. The development of the processes should be driven by fundamental research and not by trial-and-error approaches. However, the latter is still often the case in research labs. In the project the electrodeposition of selected model systems (Ni and Zn with different types of nanoparticles) under well-defined conditions was investigated. The influence of crucial deposition parameters, such as temperature, current density, and composition of the electrolyte on the properties of the deposits was studied. We could identify parameter sets for obtaining uniform layers, with improved hardness and wear resistance and with specific crystalline orientations and morphologies. The influence of the permittivity and the ionic strength of the electrolytes were studied intensively for a Watts type Ni electrolyte containing nanoparticles. These results clearly show that it is crucial to understand the interaction forces between the particles themselves and between the particles and the substrate. Dispersion coatings are now a life topic in our group. An AiF-CORNET project that will address their usage as wear resistant functional coatings in aerospace industry has just been approved. The fundamental results achieved within this DFG research grant form an excellent base for the development of industrial electroplating processes.
Projektbezogene Publikationen (Auswahl)
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The Effect of Nano Al2O3 on the Electrodeposition of Ni Composite Coatings: an Electrochemical Study. First Regional Symposium on Electrochemistry of South-East Europe, Rovinj, Croatia, May 4-8, 2008
Geta Cârâc, Lidia Benea, Denny Thiemig, Adriana Ispas, Andreas Bund, Thomas Lampke
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Electrodeposition of hydroxyapatite nanoparticles with zinciron alloys, Surface and Coatings Technology, Volume 203, Issues 10–11, 25 February 2009, Pages 1488-1493
Denny Thiemig, Alina M. Cantaragiu, Susann Schachschal, Andreas Bund, Andrij Pich, Geta Carac, Constantin Gheorghies
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Electrodeposition of Nanocomposite Coatings. 216th ECS Meeting Vienna, Austria, October 4-9, 2009
Andreas Bund, Adriana Ispas, Denny Thiemig, Jakub Nalaskowski
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Influence of ethanol on the electrocodeposition of Ni/Al2O3 nanocomposite films, Applied Surface Science, Volume 255, Issue 7, 15 January 2009, Pages 4164-4170
Denny Thiemig, Andreas Bund
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Microstructure and Particle Incorporation Behavior of Electrocodeposited Ni-Al2O3 Nanocomposites, Journal of Electrochemistry and Plating Technology
Denny Thiemig, Andreas Bund, Dagmar Dietrich, Thomas Lampke
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Characterization of Electrodeposited Zn-TiO2 Nanocomposite Coatings, 61st Annual Meeting of the International Society of Electrochemistry, Nice, France , September 26 - October 1, 2010
Cornel Constantin Lalau, Adriana Ispas, Andreas Bund, Geta Carac, Constantin Gheorghies
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Structure and properties of Ni /nanodiamond co-deposition from a Watts electrolyte, Nanocoatings 2010 International Conference on Functional Nanocoatings, Dresden, Germany, March 28-31, 2010
Daniela- Ecaterina Cosor (Rusu), Adriana Ispas, Andreas Bund, Geta Carac, Constantin Gheorghies
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Zinc electrodeposition from an acidic sulphate bath, Nanocoatings 2010 International Conference on Functional Nanocoatings, Dresden, Germany, March 28-31, 2010
Cornel Constantin Lalau, Adriana Ispas, Geta Carac, Andreas Bund, Constantin Gheorghies
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Effects of Direct Current and Pulse Electrodeposition on the Properties of Ni/Nanodiamond Coatings, The 10th Conference on Colloids and Surface Chemistry (CCSI 10) Galaţi, Romania, June 9-11, 2011
Daniela. E. Cosor Rusu, Adriana Ispas, Andreas Bund, Constantin Gheorghies, Geta Cârâc
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Electrodeposition and properties of Zn/TiO2 nanocomposite coatings, Simpozion Impactul nanotehnologiilor şi Nanomaterialelor asupra Dezvoltării Industriale şi Calităţii Vieţii, Galaţi, Romania, May 19, 2011
Cornel Constantin Lalau, Adriana Ispas, Andreas Bund, Geta Carac, Constantin Gheorghies
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Electrodeposition of nanocomposite coatings, Workshop „Development of High Temperature LIGA MEMS“, KIT Karlsruhe,Germany, July 17, 2012
Andreas Bund, Adriana Ispas
