Electrophoretic deposition of zirconia-Bioglass® composite coatings for biomedical implants

  1. S. Radice1,*,
  2. P. Kern1,
  3. G. Bürki1,
  4. J. Michler1,
  5. M. Textor2

Article first published online: 12 FEB 2007

DOI: 10.1002/jbm.a.31162

Issue

Journal of Biomedical Materials Research Part A

Journal of Biomedical Materials Research Part A

Volume 82A, Issue 2, pages 436–444, August 2007

Additional Information

How to Cite

Radice, S., Kern, P., Bürki, G., Michler, J. and Textor, M. (2007), Electrophoretic deposition of zirconia-Bioglass® composite coatings for biomedical implants. J. Biomed. Mater. Res., 82A: 436–444. doi: 10.1002/jbm.a.31162

Author Information

  1. 1

    Swiss Federal Institute for Materials Testing and Research EMPA, Feuerwerkerstrasse 39, CH-3602 Thun, Switzerland

  2. 2

    Laboratory for Surface and Science and Technology (LSST), Department of Materials, ETH Zurich, Wolfgang-Pauli-Strasse 10, CH-8093 Zurich, Switzerland

*Swiss Federal Institute for Materials Testing and Research EMPA, Feuerwerkerstrasse 39, CH-3602 Thun, Switzerland

Publication History

  1. Issue published online: 14 JUN 2007
  2. Article first published online: 12 FEB 2007
  3. Manuscript Accepted: 3 NOV 2006
  4. Manuscript Revised: 29 SEP 2006
  5. Manuscript Received: 27 MAR 2006

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Keywords:

  • electrochemical deposition;
  • ceramics;
  • composite;
  • bioactive;
  • multilayer

Abstract

Composite bilayer coatings on Ti6Al4V substrates were prepared by electrophoretic deposition, a simple and fast low temperature coating technique. Biocompatible yttrium-stabilized zirconia (YSZ) in the form of nanoparticles and bioactive Bioglass® (45S5) in the form of microparticles were chosen as coating materials. The first layer consisted of 5 μm of YSZ, deposited with the intention to avoid any metal tissue contact. The second layer consisted of 15-μm thick 45S5-YSZ composite, supposed to react with the surrounding bone tissue and to enhance implant fixation. The adsorption of YSZ nanoparticles on 45S5 microparticles in organic suspension was found to invert the surface charge of the 45S5 particles from negative to positive. This enabled cathodic electrophoretic deposition of 45S5, avoiding uncontrolled anodization (oxidation) of the substrate. The coatings were sintered at 900°C for 2 h under argon flow. The characterization was performed using SEM, EDX, and nanoindentation (cross section). Potential applications in the orthopedics field are discussed. © 2007 Wiley Periodicals, Inc. J Biomed Mater Res, 2007

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