The Effect of Coating Composition and Geometry on Thermal Barrier Coatings Lifetime
Abstract
Several factors are being investigated that affect the performance of thermal barrier coatings (TBC) for use in land-based gas turbines where coatings are mainly thermally sprayed. This study examined high velocity oxygen fuel (HVOF), air plasma-sprayed (APS), and vacuum plasma-sprayed (VPS) MCrAlYHfSi bond coatings with APS YSZ top coatings at 900–1100 °C. For superalloy 247 substrates and VPS coatings tested in 1 h cycles at 1100 °C, removing 0.6 wt %Si had no effect on average lifetime in 1 h cycles at 1100 °C, but adding 0.3%Ti had a negative effect. Rod specimens were coated with APS, HVOF, and HVOF with an outer APS layer bond coating and tested in 100 h cycles in air + 10%H2O at 1100 °C. With an HVOF bond coating, initial results indicate that 12.5 mm diameter rod specimens have much shorter 100 h cycle lifetimes than disk specimens. Furthermore, much longer lifetimes were obtained when the bond coating had an inner HVOF layer and outer APS layer.
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Fossil Energy (FE)
- OSTI Identifier:
- 1484121
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Engineering for Gas Turbines and Power
- Additional Journal Information:
- Journal Volume: 141; Journal Issue: 3; Journal ID: ISSN 0742-4795
- Publisher:
- ASME
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Coatings; Cycles; Disks; Coating processes; Thermal barrier coatings
Citation Formats
Pint, Bruce A., Lance, Michael J., and Haynes, James Allen. The Effect of Coating Composition and Geometry on Thermal Barrier Coatings Lifetime. United States: N. p., 2018.
Web. doi:10.1115/1.4041309.
Pint, Bruce A., Lance, Michael J., & Haynes, James Allen. The Effect of Coating Composition and Geometry on Thermal Barrier Coatings Lifetime. United States. https://doi.org/10.1115/1.4041309
Pint, Bruce A., Lance, Michael J., and Haynes, James Allen. Thu .
"The Effect of Coating Composition and Geometry on Thermal Barrier Coatings Lifetime". United States. https://doi.org/10.1115/1.4041309. https://www.osti.gov/servlets/purl/1484121.
@article{osti_1484121,
title = {The Effect of Coating Composition and Geometry on Thermal Barrier Coatings Lifetime},
author = {Pint, Bruce A. and Lance, Michael J. and Haynes, James Allen},
abstractNote = {Several factors are being investigated that affect the performance of thermal barrier coatings (TBC) for use in land-based gas turbines where coatings are mainly thermally sprayed. This study examined high velocity oxygen fuel (HVOF), air plasma-sprayed (APS), and vacuum plasma-sprayed (VPS) MCrAlYHfSi bond coatings with APS YSZ top coatings at 900–1100 °C. For superalloy 247 substrates and VPS coatings tested in 1 h cycles at 1100 °C, removing 0.6 wt %Si had no effect on average lifetime in 1 h cycles at 1100 °C, but adding 0.3%Ti had a negative effect. Rod specimens were coated with APS, HVOF, and HVOF with an outer APS layer bond coating and tested in 100 h cycles in air + 10%H2O at 1100 °C. With an HVOF bond coating, initial results indicate that 12.5 mm diameter rod specimens have much shorter 100 h cycle lifetimes than disk specimens. Furthermore, much longer lifetimes were obtained when the bond coating had an inner HVOF layer and outer APS layer.},
doi = {10.1115/1.4041309},
journal = {Journal of Engineering for Gas Turbines and Power},
number = 3,
volume = 141,
place = {United States},
year = {Thu Oct 04 00:00:00 EDT 2018},
month = {Thu Oct 04 00:00:00 EDT 2018}
}
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Cited by: 6 works
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Figures / Tables:
Table 1: Alloy chemical composition (mass %, balance Ni) determined by plasma and combustion analyses.
All figures and tables
(13 total)
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Works referencing / citing this record:
The Effect of HVOF Bond Coating with APS Flash Coating on TBC Performance
journal, February 2019
- Lance, M. J.; Thiesing, B. P.; Haynes, J. A.
- Oxidation of Metals, Vol. 91, Issue 5-6
Figures / Tables found in this record:
Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.