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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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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TEM of an EB-PVD PYSZ TBC close to the substrate
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TEM picure of interface between NiCoCRAlY bond coat and YPSZ TBC in as-coated condition




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