TECHNICAL PAPERS: Gas Turbines: Ceramics

Deformation of Plasma Sprayed Thermal Barrier Coatings

[+] Author and Article Information
Ufuk Senturk, Rogerio S. Lima, Christopher C. Berndt

Center for Thermal Spray Research, Department of Materials Science and Engineering, State University of New York at Stony Brook, Stony Brook, NY 11794-2275

Carlos R. C. Lima

UNIMEP Methodist University of Piracicaba, Technology Center, Rod. Santa Barbara-Iracemapolis, Km 1, Santa Barbara d’Oeste, S. Paulo, 13450-000, Brazil

J. Eng. Gas Turbines Power 122(3), 387-392 (May 15, 2000) (6 pages) doi:10.1115/1.1287493 History: Received March 09, 1999; Revised May 15, 2000
Copyright © 2000 by ASME
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Stress-displacement curves from four-point bending tests (a) for cooled and (b) non-cooled samples. The figures include samples having bond coat (“w/BC”) or no bond (“w/oBC”) coat layer which are either sprayed continuously (“C”) or with pauses (“P”).
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Yield stress of the coating system determined from the four-point bending curves. The results are given for samples having a bond coat and no bond coat layer, which are sprayed either continuously (“C”) or with pauses (“P”).
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Side view of sample deformed using four-point bending, showing cracks that have originated from the surface at the high stress region and have propagated until it was deflected at the interface formed by the pauses during spraying
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Total number of AE events for four-point bending samples detected before yielding, for samples that are sprayed (a) continuously and (b) with pauses
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AE energy versus indentation load for samples that are sprayed (a) continuously and (b) with pauses




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