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New material concepts for the next generation of plasma-sprayed thermal barrier coatings

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Abstract

In application as a thermal barrier coating (TBC), partially stabilized zirconia (Zr) approaches some limits of performance. To further enhance the efficiency of gas turbines, higher temperature capability and a longer lifetime of the coating are needed for the next generation of TBCs. This paper presents the development of new materials and concepts for application as TBC. Materials whose compositions have the pyrochlore structure or doped Zr are presented in contrast with new concepts like nanolayers between the top and bond coat, metal-glass composites, and double-layer structures. In the last concept, the new compositions are used in a combination with Zr, as a double, multi, or graded layer coating. In this case, the benefits of Zr will be combined with the promising properties of the new top coating. In the case of metal-glass composites, the paper will be focused on the influences of different plasma spraying processes on the microstructure. The performance of all these different coating systems has been evaluated by burner rig tests. The results will be presented and discussed.

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Authors and Affiliations

  1. Institute for Materials and Process in Energy Systems, Forschungszentrum Jülich GmbH, Jülich, Germany

    D. Stöver, G. Pracht, H. Lehmann, M. Dietrich, J -E. Döring & R. Vaßen

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  1. D. Stöver
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  2. G. Pracht
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  3. H. Lehmann
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  4. M. Dietrich
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  5. J -E. Döring
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  6. R. Vaßen
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Stöver, D., Pracht, G., Lehmann, H. et al. New material concepts for the next generation of plasma-sprayed thermal barrier coatings. J Therm Spray Tech 13, 76–83 (2004). https://doi.org/10.1007/s11666-004-0052-4

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  • DOI: https://doi.org/10.1007/s11666-004-0052-4

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