The content of this work is the development and investigation of a high temperature coating system for gas turbine blades. On a single crystal CMSX4 substrate a thin CVD layer of alpha-alumina was deposited as a diffusion barrier coating. As a protection against high-temperature corrosion it was covered with a PVD NiCoCrAlY layer, which also performs as a bond-coat for the following thermal barrier coating deposited by Atmospheric Plasma Spraying. The surface preparation techniques and coating parameters for the multilayer coating were optimized with respect to the bonding mechanisms of the different deposition techniques. The samples were annealed at 1100°C for 100 h under a neutral atmosphere. Furthermore thermocycle experiments were carried out to investigate thermocycle behaviour. The coating system proved its efficiency: no cracks were observed except vertical segmentation cracks in the TBC, all layers showed good adhesion and the diffusion barrier remained intact suppressing any noticeable diffusion of Al, Cr, Ta, Re, W and Ti.
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ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition
June 7–10, 1999
Indianapolis, Indiana, USA
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-7861-3
PROCEEDINGS PAPER
Investigations on the Deposition and the Efficiency of a Multilayer High Temperature Coating System for Gas Turbine Blades
Erich Lugscheider
,
Erich Lugscheider
RWTH - Aachen University of Technology, Aachen, Germany
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Ulrich Eritt
,
Ulrich Eritt
RWTH - Aachen University of Technology, Aachen, Germany
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Gunter von Hayn
,
Gunter von Hayn
RWTH - Aachen University of Technology, Aachen, Germany
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Dieter Neuschuetz
,
Dieter Neuschuetz
RWTH - Aachen University of Technology, Aachen, Germany
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Juergen Mueller
Juergen Mueller
RWTH - Aachen University of Technology, Aachen, Germany
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Erich Lugscheider
RWTH - Aachen University of Technology, Aachen, Germany
Ulrich Eritt
RWTH - Aachen University of Technology, Aachen, Germany
Gunter von Hayn
RWTH - Aachen University of Technology, Aachen, Germany
Dieter Neuschuetz
RWTH - Aachen University of Technology, Aachen, Germany
Juergen Mueller
RWTH - Aachen University of Technology, Aachen, Germany
Paper No:
99-GT-448, V004T01A012; 9 pages
Published Online:
December 16, 2014
Citation
Lugscheider, E, Eritt, U, von Hayn, G, Neuschuetz, D, & Mueller, J. "Investigations on the Deposition and the Efficiency of a Multilayer High Temperature Coating System for Gas Turbine Blades." Proceedings of the ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition. Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award; General. Indianapolis, Indiana, USA. June 7–10, 1999. V004T01A012. ASME. https://doi.org/10.1115/99-GT-448
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