5. Corrosion Rig Testing of Thermal Barrier Coating Systems

  1. Dongming Zhu,
  2. Uwe Schulz,
  3. Andrew Wereszczak and
  4. Edgar Lara-Curzio
  1. Robert Vaßen,
  2. Doris Sebold,
  3. Gerhard Pracht and
  4. Detlev Stöver

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291320.ch5

Advanced Ceramic Coatings and Interfaces: Ceramic Engineering and Science Proceedings, Volume 27, Issue 3

Advanced Ceramic Coatings and Interfaces: Ceramic Engineering and Science Proceedings, Volume 27, Issue 3

How to Cite

Vaßen, R., Sebold, D., Pracht, G. and Stöver, D. (2006) Corrosion Rig Testing of Thermal Barrier Coating Systems, in Advanced Ceramic Coatings and Interfaces: Ceramic Engineering and Science Proceedings, Volume 27, Issue 3 (eds D. Zhu, U. Schulz, A. Wereszczak and E. Lara-Curzio), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291320.ch5

Author Information

  1. Institut für Werkstoffe und Verfahren der Energietechnik Forschungszentrum Jülich GmbH Jülich, 52425, Germany

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2006

ISBN Information

Print ISBN: 9780470080535

Online ISBN: 9780470291320

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Keywords:

  • TBCS;
  • EBPVD;
  • YSZ;
  • APS;
  • vacuum plasma

Summary

A burner rig test facility was built up which allows the testing of protective coatings as thermal and environmental barrier coatings under harsh environmental conditions. In the experimental set-up liquids as salt solutions or kerosene are injected into a gas burner flame, accelerated and heated or burned in the combustion gases and finally deposited on the sample surface. As the samples are cooled by compressed air a thermal gradient can be established across the coatings allowing typically a surface temperature of 1150–1250 °C and a bond coat temperature of about 950–1000°C.

YSZ based thermal barrier coating systems have been cycled in the new rig using different corrosive liquids as pure water, NaCl and Na2SO4 solutions. Depending on the concentration of the corrosive media the lifetime of the coatings were reduced up to a factor of more than 100. Microstructural evaluation as well as X-ray diffraction analysis will be presented and the reasons for the early failure of the coatings discussed.