TY - JOUR
T1 - Piezospectroscopic Evaluation and Damage Identification for Thermal Barrier Coatings Subjected to Simulated Engine Environments
AU - Manero, Albert
AU - Selimov, Alex
AU - Fouliard, Quentin
AU - Knipe, Kevin
AU - Wischek, Janine
AU - Meid, Carla
AU - Karlsson, Anette M
AU - Bartsch, Marion
AU - Raghavan, Seetha
N1 - Manero, A., Selimov, A., Fouliard, Q., Knipe, K., Wischek, J., Meid, C., Karlsson, A. M., Bartsch, M., and Raghavan, S., 2017, “Piezospectroscopic Evaluation and Damage Identification for Thermal Barrier Coatings Subjected to Simulated Engine Environments,” Surface and Coatings Technology, 323, pp. 30–38.
PY - 2017/8/1
Y1 - 2017/8/1
N2 - The application of high temperature ceramic coatings has enabled aircraft and power generation turbines to run at higher inlet temperatures for greater efficiency. Their use extends the lifetime of the superalloy blades that bear thermal gradients and mechanical loads during operation. In this work, ex-situ photoluminescence spectroscopy was conducted to investigate the stresses within the thermally grown oxide of a thermal barrier coated tubular sample following complex realistic conditions, such as induced thermal gradients, and long duration aging. The resulting high,spatial resolution stress contour maps highlight the development of the thermally grown oxide in response to the complex conditions. The outcomes highlight both the role of the aging process and the oxide growth's influence on the stress profile which varies spatially across the specimen. The results further provide early detection of micro-damaged zones in the oxide layer nondestructively. Improving the understanding of the coating system's response to loading conditions will allow for more accurate system modeling and early detection and monitoring of damage zones, which is critical for improving efficiency and longevity of aircraft and power generation turbines. (C) 2016 Elsevier B.V. All rights reserved.
AB - The application of high temperature ceramic coatings has enabled aircraft and power generation turbines to run at higher inlet temperatures for greater efficiency. Their use extends the lifetime of the superalloy blades that bear thermal gradients and mechanical loads during operation. In this work, ex-situ photoluminescence spectroscopy was conducted to investigate the stresses within the thermally grown oxide of a thermal barrier coated tubular sample following complex realistic conditions, such as induced thermal gradients, and long duration aging. The resulting high,spatial resolution stress contour maps highlight the development of the thermally grown oxide in response to the complex conditions. The outcomes highlight both the role of the aging process and the oxide growth's influence on the stress profile which varies spatially across the specimen. The results further provide early detection of micro-damaged zones in the oxide layer nondestructively. Improving the understanding of the coating system's response to loading conditions will allow for more accurate system modeling and early detection and monitoring of damage zones, which is critical for improving efficiency and longevity of aircraft and power generation turbines. (C) 2016 Elsevier B.V. All rights reserved.
KW - Piezospectroscopy; Thermal barrier coatings; Thermal gradient mechanical load; Damage identification
UR - https://engagedscholarship.csuohio.edu/enme_facpub/321
UR - http://www.sciencedirect.com/science/article/pii/S0257897216309410?via%3Dihub
U2 - 10.1016/J.SURFCOAT.2016.09.057
DO - 10.1016/J.SURFCOAT.2016.09.057
M3 - Article
VL - 323
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
ER -