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Title: Performance of vacuum plasma spray and HVOF bond coatings at 900° and 1100 °C

Abstract

The effects of Ti and B additions to a vacuum plasma sprayed (VPS) NiCoCrAlYHfSi bond coating on thermal barrier coating (TBC) performance were studied at 1100 °C and 900 °C and compared to high-velocity oxy-fuel (HVOF) bond coatings. Using alloy 247 substrates and air plasma sprayed Y2O3-stabilized ZrO2 top coatings, additions of B or Ti + B did not improve the average TBC lifetime in 1-h cycles at 1100 °C in air with 10% H2O. The addition of Ti resulted in a decrease in lifetime. Photo-stimulated luminescence spectroscopy was used to map residual stresses in the thermally-grown Al2O3 scale. At 900 °C, closer to a typical land based turbine operating bond coating temperature, specimens were examined after ten 500-h cycles in laboratory air and air with 10%H2O to study the effect of H2O. The addition of water vapor had little effect on the measured parabolic rate constants at 900 °C and a comparison of the oxide microstructures in both environments is reported.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1423091
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Journal Volume: 337; Conference: ICMCTF 2016 - San Diego, California, United States of America - 4/24/2017 12:00:00 AM-
Country of Publication:
United States
Language:
English

Citation Formats

Lance, Michael J., Haynes, James A., and Pint, Bruce A. Performance of vacuum plasma spray and HVOF bond coatings at 900° and 1100 °C. United States: N. p., 2017. Web. doi:10.1016/j.surfcoat.2017.12.062.
Lance, Michael J., Haynes, James A., & Pint, Bruce A. Performance of vacuum plasma spray and HVOF bond coatings at 900° and 1100 °C. United States. doi:10.1016/j.surfcoat.2017.12.062.
Lance, Michael J., Haynes, James A., and Pint, Bruce A. Fri . "Performance of vacuum plasma spray and HVOF bond coatings at 900° and 1100 °C". United States. doi:10.1016/j.surfcoat.2017.12.062. https://www.osti.gov/servlets/purl/1423091.
@article{osti_1423091,
title = {Performance of vacuum plasma spray and HVOF bond coatings at 900° and 1100 °C},
author = {Lance, Michael J. and Haynes, James A. and Pint, Bruce A.},
abstractNote = {The effects of Ti and B additions to a vacuum plasma sprayed (VPS) NiCoCrAlYHfSi bond coating on thermal barrier coating (TBC) performance were studied at 1100 °C and 900 °C and compared to high-velocity oxy-fuel (HVOF) bond coatings. Using alloy 247 substrates and air plasma sprayed Y2O3-stabilized ZrO2 top coatings, additions of B or Ti + B did not improve the average TBC lifetime in 1-h cycles at 1100 °C in air with 10% H2O. The addition of Ti resulted in a decrease in lifetime. Photo-stimulated luminescence spectroscopy was used to map residual stresses in the thermally-grown Al2O3 scale. At 900 °C, closer to a typical land based turbine operating bond coating temperature, specimens were examined after ten 500-h cycles in laboratory air and air with 10%H2O to study the effect of H2O. The addition of water vapor had little effect on the measured parabolic rate constants at 900 °C and a comparison of the oxide microstructures in both environments is reported.},
doi = {10.1016/j.surfcoat.2017.12.062},
journal = {},
number = ,
volume = 337,
place = {United States},
year = {Fri Dec 01 00:00:00 EST 2017},
month = {Fri Dec 01 00:00:00 EST 2017}
}

Conference:
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