This title appears in the Scientific Report :
2017
Please use the identifier:
http://dx.doi.org/10.1016/j.surfcoat.2017.05.003 in citations.
Investigation of the resistance of open-column-structured PS-PVD TBCs to erosive and high-temperature corrosive attack
Investigation of the resistance of open-column-structured PS-PVD TBCs to erosive and high-temperature corrosive attack
In modern gas turbines, highly loaded components are internally cooled and furthermore covered with thermal barrier coatings (TBCs) to withstand the harsh operating conditions with temperatures exceeding the application limit of such coatings. Under realistic operating conditions, siliceous minerals...
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Personal Name(s): | Rezanka, Stefan |
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Mack, Daniel Emil (Corresponding author) / Mauer, Georg / Sebold, Doris / Guillon, Olivier / Vaßen, Robert | |
Contributing Institute: |
Werkstoffsynthese und Herstellungsverfahren; IEK-1 JARA-ENERGY; JARA-ENERGY |
Published in: | Surface and coatings technology, 324 (2017) S. 222 - 235 |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2017
|
DOI: |
10.1016/j.surfcoat.2017.05.003 |
Document Type: |
Journal Article |
Research Program: |
Methods and Concepts for Material Development |
Publikationsportal JuSER |
In modern gas turbines, highly loaded components are internally cooled and furthermore covered with thermal barrier coatings (TBCs) to withstand the harsh operating conditions with temperatures exceeding the application limit of such coatings. Under realistic operating conditions, siliceous minerals, of a calcium-magnesium-aluminum-silicate (CMAS) composition, are ingested into the turbine and deposited on the TBCs. Besides erosion, this also leads to degradation by chemical interaction.The plasma spray-physical vapor deposition (PS-PVD) process is an advanced method for manufacturing TBCs, which fills the gap between traditional thermal spray processes and electron beam physical vapor deposition (EB-PVD). Due to the unique plasma conditions, coatings with columnar microstructures exhibiting high strain tolerance can be created. However, because of the high amount of open porosity the resistance of such structures to CMAS and erosion attack was expected to be low.In the present work, PS-PVD TBCs were investigated in a burner rig facility under thermal gradient cycling conditions and simultaneous CMAS attack. The interactions of the PS-PVD-deposited YSZ and the CMAS melt were studied by means of scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDS) and compared to EB-PVD coatings. Additionally, the resistance of PS-PVD TBCs to erosion is compared to APS TBCs by means of room temperature tests according to ASTM G76-13. |