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Synchrotron x-ray measurements capturing thermally grown oxide behavior in thermal barrier coatings

Manero, Albert and Sofronsky, Stephen and Knipe, Kevin and Meid, Carla and Wischek, Janine and Lacdao, Claudine and Smith, Matthew and Okasinski, John and Almer, Jonathan and Karlsson, Anette M. and Bartsch, Marion and Raghavan, Seetha (2015) Synchrotron x-ray measurements capturing thermally grown oxide behavior in thermal barrier coatings. 39th International Conference & Exposition on Advanced Ceramics & Composites, 25.-30. Jan. 2015, Daytona, U.S.A..

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Abstract

In-situ synchrotron x-ray diffraction was used to identify the mechanical behavior of thermal barrier coatings under extreme environments. Experiments were conducted on ceramic coatings deposited via electron-beam physical vapor deposition on a tubular Inconel 100 substrate. The ceramic top coat consisted of a 7-8% yttria stabilized zirconia (YSZ), which was adhered to the substrate via a NiCoCrAlY bond coat. The specimens were pre-aged at 1000 °C, developing the thermally grown oxide (TGO) layers to thicknesses representative of different stages of a coating lifespan. High-energy x-rays were used to measure lattice strains in these multi-layer coatings with through transmission diffraction. Experiments were conducted under various combinations of applied thermal gradients and mechanical loads to determine the effects of these conditions on stresses within TGO and YSZ layers. Larger applied tensile loads have shown the ability to cause tensile stresses in the TGO at high temperature. The experimental results capturing time and temperature dependent behavior has shown positive contributions that will support the creation of life prediction models.

Item URL in elib:https://elib.dlr.de/98274/
Document Type:Conference or Workshop Item (Speech)
Title:Synchrotron x-ray measurements capturing thermally grown oxide behavior in thermal barrier coatings
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Manero, AlbertUniversity of Central Florida, Orlando, FL, USAUNSPECIFIED
Sofronsky, StephenUniversity of Central Florida, Orlando, FL, USAUNSPECIFIED
Knipe, KevinUniversity of Central Florida, Orlando, FL, USAUNSPECIFIED
Meid, Carlacarla.meid (at) dlr.deUNSPECIFIED
Wischek, Janinejanine.wischek (at) dlr.deUNSPECIFIED
Lacdao, ClaudineCleveland State University, Ohio, USAUNSPECIFIED
Smith, MatthewCleveland State University, Ohio, USAUNSPECIFIED
Okasinski, JohnAdvanced Photon Source, Argonne National Laboratory, Argonne, IllinoisUNSPECIFIED
Almer, JonathanAdvanced Photon Source, Argonne National Laboratory, Argonne, IllinoisUNSPECIFIED
Karlsson, Anette M.Cleveland State University, Ohio, USAUNSPECIFIED
Bartsch, Marionmarion.bartsch (at) dlr.deUNSPECIFIED
Raghavan, SeethaUniversity of Central Florida, Orlando, FL, USAUNSPECIFIED
Date:28 January 2015
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Thermal Barrier Coating, Synchrotron X-ray, High Temperature Mechanical Properties
Event Title:39th International Conference & Exposition on Advanced Ceramics & Composites
Event Location:Daytona, U.S.A.
Event Type:international Conference
Event Dates:25.-30. Jan. 2015
Organizer:American Ceramic Society
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Virtual Engine and Validation methods
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Experimental and Numerical Methods
Deposited By: Bartsch, Dr.-Ing. Marion
Deposited On:23 Sep 2015 13:45
Last Modified:23 Sep 2015 13:45

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