Microstructural characterization of thermal barrier coatings on high pressure turbine blades

2001 ◽  
Vol 146-147 ◽  
pp. 132-139 ◽  
Author(s):  
Y.H. Sohn ◽  
E.Y. Lee ◽  
B.A. Nagaraj ◽  
R.R. Biederman ◽  
R.D. Sisson
Keyword(s):  
High Pressure ◽  
Thermal Barrier Coatings ◽  
Turbine Blades ◽  
Microstructural Characterization ◽  
Thermal Barrier ◽  
High Pressure Turbine ◽  
Barrier Coatings

scholarly journals Oxidation Behavior of the Monolayered La2Zr2O7, Composite La2Zr2O7 + 8YSZ, and Double-Ceramic Layered La2Zr2O7/La2Zr2O7 + 8YSZ/8YSZ Thermal Barrier Coatings

Materials ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3242 ◽  
Author(s):  
Anna Jasik ◽  
Grzegorz Moskal ◽  
Marta Mikuśkiewicz ◽  
Agnieszka Tomaszewska ◽  
Sebastian Jucha ◽  
...  
Keyword(s):  
Thermal Barrier Coatings ◽  
Bond Coat ◽  
Microstructural Characterization ◽  
Thermally Grown Oxide ◽  
Atmospheric Plasma ◽  
Ceramic Layer ◽  
Thermal Barrier ◽  
Equal Weight ◽  
Barrier Coatings

The degradation process of thermal barrier coatings (TBCs) such as monolayered La2Zr2O7, composite 50% La2Zr2O7 + 50% 8YSZ, and double-ceramic layer (DCL) La2Zr2O7/50% La2Zr2O7 + 50% 8YSZ/8YSZ was investigated. Coatings were deposited using the atmospheric plasma spraying (APS) process (ceramic layer and bond-coat) on the Ni-based superalloy substrate with Ni-22Cr-10Al-1Y bond-coat. The thickness of the ceramic top-coats in all cases were 300 µm. In the case of La2Zr2O7/8YSZ, the internal sublayer was built from 8YSZ powder whereas the outer from La2Zr2O7. Between both sublayers’ “composite” a 50% La2Zr2O7 + 50% 8YSZ zone was present. The “composite” 50% La2Zr2O7 + 50% 8YSZ TBC system was sprayed from two different feedstock powders with equal weight ratios. In the first part of the investigation, the microstructural characterization of the TBCs was presented. The main goals were related to the characterization of the degradation processes in different TBC systems with special emphasis on the phenomenon in the thermally grown oxide (TGO) zone related to oxidation, and the phenomenon related to phase stability in ceramic top-coats as related to temperature influence. The oxidation test was carried out in air at 1100 °C for 500 h. In the second step of the investigation, the numerical simulation of the monolayered TBC 8YSZ and La2Zr2O7 systems was analyzed from the stress distribution point of view. Additionally, the two-layered TBC coating of the DCL type was also analyzed.

scholarly journals Morphological and microstructural characterization of laser-glazed plasma-sprayed thermal barrier coatings

2006 ◽  
Vol 200 (9) ◽  
pp. 2929-2937 ◽  
Author(s):  
C. Batista ◽  
A. Portinha ◽  
R.M. Ribeiro ◽  
V. Teixeira ◽  
M.F. Costa ◽  
...  
Keyword(s):  
Thermal Barrier Coatings ◽  
Microstructural Characterization ◽  
Thermal Barrier ◽  
Barrier Coatings ◽  
Plasma Sprayed

Microstructural characterization of the failures of thermal barrier coatings on Ni-base superalloys

2003 ◽  
Vol 20 (4) ◽  
pp. 495-506 ◽  
Author(s):  
N. M. Yanar ◽  
G. Kim ◽  
S. Hamano ◽  
F. S. Pettit ◽  
G. H. Meier
Keyword(s):  
Thermal Barrier Coatings ◽  
Microstructural Characterization ◽  
Thermal Barrier ◽  
Barrier Coatings

Microstructural characterization of porous thermal barrier coatings by IR gas porosimetry and sintering forecasts

2013 ◽  
Vol 61 (1) ◽  
pp. 248-262 ◽  
Author(s):  
F. Cernuschi ◽  
I.O. Golosnoy ◽  
P. Bison ◽  
A. Moscatelli ◽  
R. Vassen ◽  
...  
Keyword(s):  
Thermal Barrier Coatings ◽  
Microstructural Characterization ◽  
Thermal Barrier ◽  
Barrier Coatings
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