Fabrication of particle and composition gradients by systematic interaction of sedimentation and electrical field in electrophoretic deposition |
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| Authors: | Sylvia Bonnas Hans-Joachim Ritzhaupt-Kleissl Jürgen Haußelt |
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| Affiliation: | 1. Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen–Nuremberg, Cauerstrasse 6, 91058 Erlangen, Germany;2. Institute of Polymer Materials, Department of Materials Science and Engineering, University of Erlangen–Nuremberg, Martensstrasse 7, 91058 Erlangen, Germany;3. Institute for Surface Science and Corrosion, Department of Materials Science and Engineering, University of Erlangen–Nuremberg, Martensstrasse 7, 91058 Erlangen, Germany |
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| Abstract: | The systematic interaction of sedimentation and electrical field in electrophoretic deposition allows the tailoring of specific properties of deposited green bodies. This technique permits a selective deposition of the nanosized fraction of conventional powders with broad or non-monomodal particle size distribution, thus making preceding classification obsolete. Potential applications are coatings with a very smooth surface or the replication of microstructures or moulds which are filled with nanosized particles and subsequently with coarser particles as support in one process step. Also, graded structures can be fabricated with regard to particle size distribution, porosity and composition (e.g. zirconia toughened alumina). In this paper, the interaction of sedimentation and electrical field in electrophoretic deposition is described. In addition the effectiveness of the combined process will be shown. |
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