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3797 |
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Wednesday, May 21, 2014, Hall F 2:20 PM Suspension Spraying 1 |
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Columnar structured thermal barrier coatings (TBCs) by suspension plasma spraying (SPS) |
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Nadin Schlegel* / Forschungszentrum Jülich GmbH,
Institut für Energie- und Klimaforschung,
IEK-1: Werkstoffsynthese und Herstellungsverfahren, Germany Svenja Ebert / Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung, IEK-1: Werkstoffsynthese und Herstellungsverfahren, Jülich Georg Mauer/ Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung, IEK-1: Werkstoffsynthese und Herstellungsverfahren, Jülich Robert Vaßen/ Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung, IEK-1: Werkstoffsynthese und Herstellungsverfahren, Jülich |
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The suspension plasma spraying (SPS) process has been developed to permit the feeding of sub-micrometer sized powder into the plasma plume. This enables compared to the conventional atmospheric plasma spraying (APS) process the deposition of new microstructures as highly porous or segmented coatings. Moreover, as shown in this article, it is also possible to deposit columnar structured coatings. Due to their strain tolerance they play a decisive role in the field of thermal barrier coatings (TBCs). Currently columnar structured coatings for TBC applications are typically applied by electron beam-physical vapor deposition (EB-PVD) and more recently by the plasma spray-physical vapor deposition (PS-PVD) process. Both of these processes do need low pressures while SPS is performed under atmospheric conditions. In this paper deposition parameters of the columnar TBCs by SPS are shown. Furthermore their microstructure, physical properties and thermal cycling behavior are described. |