TY  - JOUR
AU  - Rezanka, Stefan
AU  - Mack, Daniel Emil
AU  - Mauer, Georg
AU  - Sebold, Doris
AU  - Guillon, Olivier
AU  - Vaßen, Robert
TI  - Investigation of the resistance of open-column-structured PS-PVD TBCs to erosive and high-temperature corrosive attack
JO  - Surface and coatings technology
VL  - 324
SN  - 0257-8972
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2017-04377
SP  - 222 - 235
PY  - 2017
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000406988200026
DO  - DOI:10.1016/j.surfcoat.2017.05.003
UR  - https://juser.fz-juelich.de/record/834419
ER  -