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Recent Developments in the Field of Thermal Barrier Coatings

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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.

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Acknowledgments

The authors would like to thank Holger Kaßner for his contribution in the field of suspension plasma sprayed coatings. Also the contributions of the other colleagues in the TBC group are gratefully acknowledged.

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  1. Institute of Energy Research (IEF-1), Forschungszentrum Jülich GmbH, 52428, Jülich, Germany

    Robert Vassen, Alexandra Stuke & Detlev Stöver

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  1. Robert Vassen
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  2. Alexandra Stuke
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  3. Detlev Stöver
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Correspondence to Robert Vassen.

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Vassen, R., Stuke, A. & Stöver, D. Recent Developments in the Field of Thermal Barrier Coatings. J Therm Spray Tech 18, 181–186 (2009). https://doi.org/10.1007/s11666-009-9312-7

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  • DOI: https://doi.org/10.1007/s11666-009-9312-7

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