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TECHNICAL PAPERS: Gas Turbines: Ceramics, and Manufacturing Materials and Metallurgy

Influence of Processing on Microstructure and Performance of Electron Beam Physical Vapor Deposition (EB-PVD) Thermal Barrier Coatings

[+] Author and Article Information
U. Schulz, K. Fritscher, C. Leyens, M. Peters

DLR–German Aerospace Center, Institute of Materials Research, D-51170 Cologne, Germany

J. Eng. Gas Turbines Power 124(2), 229-234 (Mar 26, 2002) (6 pages) doi:10.1115/1.1447238 History: Received November 01, 1999; Revised February 01, 2000; Online March 26, 2002
Copyright © 2002 by ASME
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References

Schulz, U., Kröder, C., Brien, J., Schurmann, H., and Fritscher, K., 1999, U.S. Patent 6063435.
Leyens,  C., Schulz,  U., Pint,  B. A., and Wright,  I. G., 1999, “Influence of EB-PVD TBC Microstructure on Thermal Barrier Coating System Performance Under Cyclic Oxidation and Hot Corrosion Conditions,” Surf. Coat. Technol., 120–121, pp. 68–76.
Fritscher, K., Schulz, U., and Schmücker, M., 1999, “EB-PVD TBC lifetime Response to Various Bond Coat Pretreatments,” Cyclic Oxidation of High Temperature Materials, M. Schütze and W. J. Quadakkers, eds., The Institute of Materials, London, EFC public. No. 27, pp. 383–391.
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Figures

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TEM picure of interface between NiCoCRAlY bond coat and YPSZ TBC in as-coated condition
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TEM of an EB-PVD PYSZ TBC close to the substrate
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Fractured cross sections of EB-PVD TSCs with fine (top) and coarse (bottom) microstructure
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Weight change of EB-PVD TBCs on CMSX-4 coupons at 1100°C cycles. Arrows indicate spallation of the TBC.
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Normalized cyclic lifetimes obtained in two alternative furnace tests at 1100°C
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Young’s modulus of various EB-PVD TBCs having different thickness as a function of mechanical load
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Young’s modulus of free-standing EB-PVD TBCs with different microstructures
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Lifetime of different PYSZ microstructures tested under sodium sulfate hot corrosion conditions at 950°C
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Typical failure of a TBC system tested under hot corrosion conditions

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