Thermal Conductivity Analysis and Lifetime Testing of Suspension Plasma-Sprayed Thermal Barrier Coatings
Suspension plasma spraying (SPS) has become an interesting method for the production of thermal barrier coatings for gas turbine components. The development of the SPS process has led to structures with segmented vertical cracks or column-like structures that can imitate strain-tolerant air plasma s...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2014-08-01
|
Series: | Coatings |
Subjects: | |
Online Access: | http://www.mdpi.com/2079-6412/4/3/630 |
id |
doaj-4b868a0e2a0a4fc086d01f3e32ad923a |
---|---|
record_format |
Article |
spelling |
doaj-4b868a0e2a0a4fc086d01f3e32ad923a2020-11-24T21:10:37ZengMDPI AGCoatings2079-64122014-08-014363065010.3390/coatings4030630coatings4030630Thermal Conductivity Analysis and Lifetime Testing of Suspension Plasma-Sprayed Thermal Barrier CoatingsNicholas Curry0Kent VanEvery1Todd Snyder2Nicolaie Markocsan3Department of Engineering Science, University West, Gustava Melins Gata 2, Trollhattan 461 86, SwedenProgressive Surface, Grand Rapids, MI 49512, USAProgressive Surface, Grand Rapids, MI 49512, USADepartment of Engineering Science, University West, Gustava Melins Gata 2, Trollhattan 461 86, SwedenSuspension plasma spraying (SPS) has become an interesting method for the production of thermal barrier coatings for gas turbine components. The development of the SPS process has led to structures with segmented vertical cracks or column-like structures that can imitate strain-tolerant air plasma spraying (APS) or electron beam physical vapor deposition (EB-PVD) coatings. Additionally, SPS coatings can have lower thermal conductivity than EB-PVD coatings, while also being easier to produce. The combination of similar or improved properties with a potential for lower production costs makes SPS of great interest to the gas turbine industry. This study compares a number of SPS thermal barrier coatings (TBCs) with vertical cracks or column-like structures with the reference of segmented APS coatings. The primary focus has been on lifetime testing of these new coating systems. Samples were tested in thermo-cyclic fatigue at temperatures of 1100 °C for 1 h cycles. Additional testing was performed to assess thermal shock performance and erosion resistance. Thermal conductivity was also assessed for samples in their as-sprayed state, and the microstructures were investigated using SEM.http://www.mdpi.com/2079-6412/4/3/630thermal barrier coatingsuspension plasma spraythermal shockthermo-cyclic fatiguethermal conductivity |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Nicholas Curry Kent VanEvery Todd Snyder Nicolaie Markocsan |
spellingShingle |
Nicholas Curry Kent VanEvery Todd Snyder Nicolaie Markocsan Thermal Conductivity Analysis and Lifetime Testing of Suspension Plasma-Sprayed Thermal Barrier Coatings Coatings thermal barrier coating suspension plasma spray thermal shock thermo-cyclic fatigue thermal conductivity |
author_facet |
Nicholas Curry Kent VanEvery Todd Snyder Nicolaie Markocsan |
author_sort |
Nicholas Curry |
title |
Thermal Conductivity Analysis and Lifetime Testing of Suspension Plasma-Sprayed Thermal Barrier Coatings |
title_short |
Thermal Conductivity Analysis and Lifetime Testing of Suspension Plasma-Sprayed Thermal Barrier Coatings |
title_full |
Thermal Conductivity Analysis and Lifetime Testing of Suspension Plasma-Sprayed Thermal Barrier Coatings |
title_fullStr |
Thermal Conductivity Analysis and Lifetime Testing of Suspension Plasma-Sprayed Thermal Barrier Coatings |
title_full_unstemmed |
Thermal Conductivity Analysis and Lifetime Testing of Suspension Plasma-Sprayed Thermal Barrier Coatings |
title_sort |
thermal conductivity analysis and lifetime testing of suspension plasma-sprayed thermal barrier coatings |
publisher |
MDPI AG |
series |
Coatings |
issn |
2079-6412 |
publishDate |
2014-08-01 |
description |
Suspension plasma spraying (SPS) has become an interesting method for the production of thermal barrier coatings for gas turbine components. The development of the SPS process has led to structures with segmented vertical cracks or column-like structures that can imitate strain-tolerant air plasma spraying (APS) or electron beam physical vapor deposition (EB-PVD) coatings. Additionally, SPS coatings can have lower thermal conductivity than EB-PVD coatings, while also being easier to produce. The combination of similar or improved properties with a potential for lower production costs makes SPS of great interest to the gas turbine industry. This study compares a number of SPS thermal barrier coatings (TBCs) with vertical cracks or column-like structures with the reference of segmented APS coatings. The primary focus has been on lifetime testing of these new coating systems. Samples were tested in thermo-cyclic fatigue at temperatures of 1100 °C for 1 h cycles. Additional testing was performed to assess thermal shock performance and erosion resistance. Thermal conductivity was also assessed for samples in their as-sprayed state, and the microstructures were investigated using SEM. |
topic |
thermal barrier coating suspension plasma spray thermal shock thermo-cyclic fatigue thermal conductivity |
url |
http://www.mdpi.com/2079-6412/4/3/630 |
work_keys_str_mv |
AT nicholascurry thermalconductivityanalysisandlifetimetestingofsuspensionplasmasprayedthermalbarriercoatings AT kentvanevery thermalconductivityanalysisandlifetimetestingofsuspensionplasmasprayedthermalbarriercoatings AT toddsnyder thermalconductivityanalysisandlifetimetestingofsuspensionplasmasprayedthermalbarriercoatings AT nicolaiemarkocsan thermalconductivityanalysisandlifetimetestingofsuspensionplasmasprayedthermalbarriercoatings |
_version_ |
1716755859810287616 |