Journal of Thermal Spray Technology

, Volume 18, Issue 2, pp 181–186

Recent Developments in the Field of Thermal Barrier Coatings

Peer Reviewed

DOI: 10.1007/s11666-009-9312-7

Cite this article as:
Vassen, R., Stuke, A. & Stöver, D. J Therm Spray Tech (2009) 18: 181. doi:10.1007/s11666-009-9312-7

Abstract

Conventional thermal barrier coating (TBC) systems consist of a duplex structure with a metallic bondcoat and a ceramic, heat-isolative topcoat. Several recent research activities are concentrating on developing improved bondcoat or topcoat materials; for the topcoat especially, those with reduced thermal conductivity are investigated. Using advanced topcoat materials, the ceramic coating can be further divided into layers with different functions. One example is the double-layer system in which conventional yttria-stabilized zirconia (YSZ) is used as bottom and new materials such as pyrochlores or perovskites are used as topcoat layers. These systems demonstrated an improved temperature capability compared to standard YSZ. In addition, new functions are introduced within the TBCs. These can be sensorial properties that can be used for an improved temperature control or even for monitoring remaining lifetime. Further increased application temperatures will also lead to efforts for a further improvement of the reflectivity of the coatings to reduce the radiative heat transfer through the TBC.

Keywords

ceramic top coats gas turbines multifunctional coatings plasma spraying thermal barrier coating 

Copyright information

© ASM International 2009

Authors and Affiliations

  • Robert Vassen
    • 1
  • Alexandra Stuke
    • 1
  • Detlev Stöver
    • 1
  1. 1.Institute of Energy Research (IEF-1), Forschungszentrum Jülich GmbHJülichGermany

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