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. Much longer lifetimes were obtained when the bond coating had an inner HVOF layer and outer APS layer.
Issue Section:
Research Papers
References
1.
Summerfield
, I. R.
, Goldthorpe
, S. H.
, and Bower
, C. J.
, 1993
, “Combating Global Warming–Reducing CO2 Emissions From Coal-Fired Power Plant
,” Proc. Inst. Mech. Eng. A
, 207
(2
), pp. 81
–88
.2.
Southern Company, 2017, Southern Company, Atlanta, GA, accessed Sept. 5, 2018, www.southerncompany.com/newsroom/2017/june-2017/0628-kemper.html
3.
Naslain
, R.
, 2004
, “Design, Preparation and Properties of Non-Oxide CMCs for Application in Engines and Nuclear Reactors: An Overview
,” Compos. Sci. Technol.
, 64
(2
), pp. 155
–170
.4.
Bennett
, A.
, 1986
, “Properties of Thermal Barrier Coatings
,” Mater. Sci. Technol.
, 2
(3
), pp. 257
–261
.5.
DeMasi-Marcin
, J. T.
, and Gupta
, D. K.
, 1994
, “Protective Coatings in the Gas Turbine Engine
,” Surf. Coat. Technol.
, 68–69
, pp. 1
–9
.6.
Nelson
, W. A.
, and Orenstein
, R. M.
, 1997
, “TBC Experience in Land-Based Gas Turbines
,” J. Therm. Spray Technol.
, 6
(2
), pp. 176
–180
.7.
Goward
, G. W.
, 1998
, “Progress in Coatings for Gas Turbine Airfoils
,” Surf. Coat. Technol.
, 108–109
, pp. 73
–79
.8.
Pint
, B. A.
, Wright
, I. G.
, Lee
, W. Y.
, Zhang
, Y.
, Prüßner
, K.
, and Alexander
, K. B.
, 1998
, “Substrate and Bond Coat Compositions: Factors Affecting Alumina Scale Adhesion
,” Mater. Sci. Eng. A
, 245
(2
), pp. 201
–211
.9.
Itoh
, Y.
, Saitoh
, M.
, and Tamura
, M.
, 2000
, “Characteristics of MCrAlY Coatings Sprayed by High Velocity Oxygen-Fuel Spraying System
,” ASME J. Eng. Gas Turbines Power
, 122
(1
), pp. 43
–49
.10.
Nicholls
, J. R.
, 2003
, “Advances in Coating Design for High-Performance Gas Turbines
,” MRS Bull.
, 28
(9
), pp. 659
–670
.11.
Gleeson
, B.
, 2006
, “Thermal Barrier Coatings for Aeroengine Applications
,” J. Propul. Power
, 22
(2
), pp. 375
–383
.12.
Stringer
, J.
, 1998
, “Coatings in the Electricity Supply Industry: Past, Present, and Opportunities for the Future
,” Surf. Coat. Technol.
, 108–109
, pp. 1
–9
.13.
Lance
, M. J.
, Unocic
, K. A.
, Haynes
, J. A.
, and Pint
, B. A.
, 2015
, “APS TBC Performance on Directionally-Solidified Superalloy Substrates With HVOF NiCoCrAlYHfSi Bond Coatings
,” Surf. Coat. Technol.
, 284
, pp. 9
–13
.14.
Leyens
, C.
, Fritscher
, K.
, Gehrling
, R.
, Peters
, M.
, and Kaysser
, W. A.
, 1996
, “Oxide Scale Formation on an MCrAlY Coating in Various H2-H2O Atmospheres
,” Surf. Coat. Technol.
, 82
(1–2
), pp. 133
–144
.15.
Janakiraman
, R.
, Meier
, G. H.
, and Pettit
, F. S.
, 1999
, “The Effect of Water Vapor on the Oxidation of Alloys That Developed Alumina Scales for Protection
,” Metall. Mater. Trans.
, 30
(11
), pp. 2905
–2913
.16.
Onal
, K.
, Maris-Sida
, M. C.
, Meier
, G. H.
, and Pettit
, F. S.
, 2003
, “Water Vapor Effects on the Cyclic Oxidation Resistance of Alumina-Forming Alloys
,” Mater. High Temp.
, 20
(3
), pp. 327
–337
.17.
Pint
, B. A.
, Haynes
, J. A.
, Zhang
, Y.
, More
, K. L.
, and Wright
, I. G.
, 2006
, “The Effect of Water Vapor on the Oxidation Behavior of Ni-Pt-Al Coatings and Alloys
,” Surf. Coat. Technol.
, 201
(7
), pp. 3852
–3856
.18.
Smialek
, J. L.
, 2008
, “Enigmatic Moisture Effects on Al2O3 Scale and TBC Adhesion
,” Mater. Sci. Forum
, 595–598
, pp. 191
–198
.19.
Quadakkers
, W. J.
, Żurek
, J.
, and Hänsel
, M.
, 2009
, “Effect of Water Vapor on High Temperature Oxidation of FeCr Alloys
,” JOM
, 61
(7
), pp. 44
–50
.20.
Déneux
, V.
, Cadoret
, Y.
, Hervier
, S.
, and Monceau
, D.
, 2010
, “Effect of Water Vapor on the Spallation of Thermal Barrier Coating Systems During Laboratory Cyclic Oxidation Testing
,” Oxid. Met.
, 73
(1–2
), pp. 83
–93
.21.
Pint
, B. A.
, Garner
, G. W.
, Lowe
, T. M.
, Haynes
, J. A.
, and Zhang
, Y.
, 2011
, “Effect of Increased Water Vapor Levels on TBC Lifetime With Pt-Containing Bond Coatings
,” Surf. Coat. Technol.
, 206
(7
), pp. 1566
–1570
.22.
Pint
, B. A.
, Haynes
, J. A.
, Unocic
, K. A.
, and Zhang
, Y.
, 2012
, The Effect of Water Vapor and Superalloy Composition on Thermal Barrier Coating Lifetime
, Superalloys 2012 E.
Huron
, ed., TMS
, Warrendale, PA
, pp. 723
–732
.23.
Haynes
, J. A.
, Unocic
, K. A.
, and Pint
, B. A.
, 2013
, “Effect of Water Vapor on the 1100 °C Oxidation Behavior of Plasma-Sprayed TBCs With HVOF NiCoCrAlX Bond Coats
,” Surf. Coat. Technol.
, 215
, pp. 39
–45
.24.
Lance
, M. J.
, Unocic
, K. A.
, Haynes
, J. A.
, and Pint
, B. A.
, 2013
, “Effect of Water Vapor on Thermally Grown Alumina Scales on Simple and Pt-Modified Aluminide Coatings
,” Surf. Coat. Technol.
, 237
, pp. 2
–7
.25.
Haynes
, J. A.
, Unocic
, K. A.
, Lance
, M. J.
, and Pint
, B. A.
, 2013
, “Impact of Superalloy Composition, Bond Coat Roughness and Water Vapor on TBCs With HVOF NiCoCrAlYHfSi Bond Coatings
,” Surf. Coat. Technol.
, 237
, pp. 65
–70
.26.
Lance
, M. J.
, Unocic
, K. A.
, Haynes
, J. A.
, and Pint
, B. A.
, 2014
, “The Effect of Cycle Frequency, H2O and CO2 on TBC Lifetime With NiCoCrAlYHfSi Bond Coatings
,” Surf. Coat. Technol.
, 260
, pp. 107
–112
.27.
Pint
, B. A.
, Unocic
, K. A.
, and Haynes
, J. A.
, 2016
, “The Effect of Environment on TBC Lifetime
,” ASME
J. Eng. Gas Turbines Power, 138
(8
), p. 082102
.28.
Pint
, B. A.
, Haynes
, J. A.
, Lance
, M. J.
, Aldridge
, H. L.
, Jr., Viswanathan
, V.
, Dwivedi
, G.
, and Sampath
, S.
, 2016
, Factors Affecting TBC Furnace Cycle Lifetime: Temperature, Environment, Structure and Composition
, Superalloys 2016, M.
Hardy
, ed., TMS
, Warrendale, PA
, pp. 727
–734
.29.
Viswanathan
, V.
, Dwivedi
, G.
, and Sampath
, S.
, 2014
, “Engineered Multilayer Thermal Barrier Coatings for Enhanced Durability and Functional Performance
,” J. Am. Ceram. Soc.
, 97
(9
), pp. 2770
–2778
.30.
Nowak
, W.
, Naumenko
, D.
, Mor
, G.
, Mor
, F.
, Macka
, D. E.
, Vassena
, R.
, Singheiser
, L.
, and Quadakkers
, W. J.
, 2014
, “Effect of Processing Parameters on MCrAlY Bondcoat Roughness and Lifetime of APS–TBC Systems
,” Surf. Coat. Technol.
, 260
, pp. 82
–89
.31.
Gupta, D. K., and Duvall, D. S., 1984,
A Silicon and Hafnium Modified Plasma Sprayed MCrAlY Coating for Single Crystal Superalloys
, in Superalloys 1984, M. Gell, C. S. Kortovich, R. H. Bricknell, W. B. Kent and J. F. Radavich, eds., TMS, Warrendale, PA, p. 711–720.32.
Unocic
, K. A.
, and Pint
, B. A.
, 2010
, “Characterization of the Alumina Scale Formed on a Commercial MCrAlYHfSi Coating
,” Surf. Coat. Technol.
, 205
(5
), pp. 1178
–1182
.33.
Lance
, M. L.
, Haynes
, J. A.
, and Pint
, B. A.
, 2016
, “The Effects of Temperature and Substrate Curvature on TBC Lifetime and Residual Stress in Alumina Scales Beneath APS TBCs
,” Surf. Coat. Technol.
, 308
, pp. 19
–23
.34.
Unocic
, K. A.
, Leonard
, D. N.
, and Pint
, B. A.
, 2014
, “Effect of Boron on the Oxidation Behavior of NiCrAlYHfTi in H2O and CO2 Environments
,” Surf. Coat. Technol.
, 260
, pp. 17
–22
.35.
Naumenko
, D.
, Pint
, B. A.
, and Quadakkers
, W. J.
, 2016
, “Current Thoughts on Reactive Element Effects in Alumina-Forming Systems—in Memory of John Stringer
,” Oxid. Met.
, 86
(1–2
), pp. 1
–43
.36.
Echsler
, H.
, Renusch
, D.
, and Schütze
, M.
, 2004
, “Bond Coat Oxidation and Its Significance for Life Expectancy of Thermal Barrier Coating Systems
,” Mater. Sci. Technol.
, 20
(3
), pp. 307
–318
.37.
Naumenko
, D.
, Shemet
, V.
, Singheiser
, L.
, and Quadakkers
, W. J.
, 2009
, “Failure Mechanisms of Thermal Barrier Coatings on MCrAlY-Type Bondcoats Associated With Formation of Thermally Grown Oxide
,” J. Mater. Sci.
, 44
(7
), pp. 1687
–1703
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