The effect of coating composition and geometry on TBC lifetime

Bruce A. Pint; Michael J. Lance; J. Allen Haynes

doi:10.1115/GT2017-65103

The effect of coating composition and geometry on TBC lifetime

Bruce A. Pint, Michael J. Lance, J. Allen Haynes

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

2 Scopus citations

Abstract

Several factors are being investigated that affect the performance of thermal barrier coatings (TBC) for use in landbased 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 0.6wt.%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. Longer lifetimes were obtained when the bond coating had an inner HVOF layer and outer APS layer.

Original language	English
Title of host publication	Ceramics; Controls, Diagnostics and Instrumentation; Education; Manufacturing Materials and Metallurgy
Publisher	American Society of Mechanical Engineers (ASME)
ISBN (Electronic)	9780791850916
DOIs	https://doi.org/10.1115/GT2017-65103
State	Published - 2017
Event	ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition, GT 2017 - Charlotte, United States Duration: Jun 26 2017 → Jun 30 2017

Publication series

Name	Proceedings of the ASME Turbo Expo
Volume	6

Conference

Conference	ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition, GT 2017
Country/Territory	United States
City	Charlotte
Period	06/26/17 → 06/30/17

Bibliographical note

Publisher Copyright:
Copyright © 2017 ASME.

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10.1115/GT2017-65103

Cite this

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title = "The effect of coating composition and geometry on TBC lifetime",

abstract = "Several factors are being investigated that affect the performance of thermal barrier coatings (TBC) for use in landbased 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 0.6wt.%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. Longer lifetimes were obtained when the bond coating had an inner HVOF layer and outer APS layer.",

author = "Pint, {Bruce A.} and Lance, {Michael J.} and Haynes, {J. Allen}",

note = "Publisher Copyright: Copyright {\textcopyright} 2017 ASME.; ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition, GT 2017 ; Conference date: 26-06-2017 Through 30-06-2017",

year = "2017",

doi = "10.1115/GT2017-65103",

language = "English",

series = "Proceedings of the ASME Turbo Expo",

publisher = "American Society of Mechanical Engineers (ASME)",

booktitle = "Ceramics; Controls, Diagnostics and Instrumentation; Education; Manufacturing Materials and Metallurgy",

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Pint, BA , Lance, MJ & Haynes, JA 2017, The effect of coating composition and geometry on TBC lifetime. in Ceramics; Controls, Diagnostics and Instrumentation; Education; Manufacturing Materials and Metallurgy. Proceedings of the ASME Turbo Expo, vol. 6, American Society of Mechanical Engineers (ASME), ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition, GT 2017, Charlotte, United States, 06/26/17. https://doi.org/10.1115/GT2017-65103

The effect of coating composition and geometry on TBC lifetime. / Pint, Bruce A.; Lance, Michael J.; Haynes, J. Allen.
Ceramics; Controls, Diagnostics and Instrumentation; Education; Manufacturing Materials and Metallurgy. American Society of Mechanical Engineers (ASME), 2017. (Proceedings of the ASME Turbo Expo; Vol. 6).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Lance, Michael J.

AU - Haynes, J. Allen

PY - 2017

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N2 - Several factors are being investigated that affect the performance of thermal barrier coatings (TBC) for use in landbased 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 0.6wt.%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. Longer lifetimes were obtained when the bond coating had an inner HVOF layer and outer APS layer.

AB - Several factors are being investigated that affect the performance of thermal barrier coatings (TBC) for use in landbased 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 0.6wt.%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. Longer lifetimes were obtained when the bond coating had an inner HVOF layer and outer APS layer.

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ER -

The effect of coating composition and geometry on TBC lifetime

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