The static and low cycle fatigue strength of an air plasma sprayed (APS) partially stabilized zirconia thermal barrier coating (TBC) is experimentally evaluated. The shear testing utilized the Iosipescu shear test arrangement. Testing was performed parallel to the TBC-substrate interface. The TBC testing required an innovative use of steel extensions with the TBC bonded between the steel extensions to form the standard losipescu specimen shape. The test method appears to have been successful. Fracture of the TBC was initiated in shear, although unconstrained specimen fractures propagated at the TBC-bond coat interface. The use of side grooves on the TBC was successful in keeping the failure in the gage section and did not appear to affect the shear strength values that were measured. Low cycle fatigue failures were obtained at high stress levels approaching the ultimate strength of the TBC. The static and fatigue strengths do not appear to be markedly different from tensile properties for comparable TBC material.
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January 1998
Technical Papers
Shear Strength of a Thermal Barrier Coating Parallel to the Bond Coat
T. A. Cruse,
T. A. Cruse
Mechanical Engineering Department, Vanderbilt University, Nashville, TN 37205
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R. C. Dommarco,
R. C. Dommarco
Mechanical Engineering Department, Vanderbilt University, Nashville, TN 37205
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P. C. Basti´as
P. C. Basti´as
Mechanical Engineering Department, Vanderbilt University, Nashville, TN 37205
Search for other works by this author on:
T. A. Cruse
Mechanical Engineering Department, Vanderbilt University, Nashville, TN 37205
R. C. Dommarco
Mechanical Engineering Department, Vanderbilt University, Nashville, TN 37205
P. C. Basti´as
Mechanical Engineering Department, Vanderbilt University, Nashville, TN 37205
J. Eng. Mater. Technol. Jan 1998, 120(1): 26-32 (7 pages)
Published Online: January 1, 1998
Article history
Received:
October 5, 1996
Revised:
July 17, 1997
Online:
November 27, 2007
Citation
Cruse, T. A., Dommarco, R. C., and Basti´as, P. C. (January 1, 1998). "Shear Strength of a Thermal Barrier Coating Parallel to the Bond Coat." ASME. J. Eng. Mater. Technol. January 1998; 120(1): 26–32. https://doi.org/10.1115/1.2806834
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