Thermophysical properties and cyclic lifetime of plasma sprayed SrAl 12 O 19 for thermal barrier coating applications

2020 ◽  
Vol 103 (10) ◽  
pp. 5599-5611 ◽  
Author(s):  
Xin Zhou ◽  
Wenjia Song ◽  
Jieyan Yuan ◽  
Qingmei Gong ◽  
Hao Zhang ◽  
...  
Keyword(s):  
Thermal Barrier Coating ◽  
Thermophysical Properties ◽  
Thermal Barrier ◽  
Barrier Coating ◽  
O 19 ◽  
Plasma Sprayed

Low conductivity plasma sprayed thermal barrier coating using hollow psz spheres: Correlation between thermophysical properties and microstructure

2008 ◽  
Vol 202 (10) ◽  
pp. 1994-2001 ◽  
Author(s):  
Ghislaine Bertrand ◽  
Pierre Bertrand ◽  
Priscille Roy ◽  
Catherine Rio ◽  
Rémy Mevrel
Keyword(s):  
Thermal Barrier Coating ◽  
Thermophysical Properties ◽  
Thermal Barrier ◽  
Barrier Coating ◽  
Plasma Sprayed

Enhanced ablation resistance through laser glazing of plasma sprayed LaTi 2 Al 9 O 19 -based functionally graded thermal barrier coating

2016 ◽  
Vol 42 (8) ◽  
pp. 10184-10190 ◽  
Author(s):  
S.R. Dhineshkumar ◽  
Muthukannan Duraiselvam ◽  
S. Natarajan ◽  
S.S. Panwar ◽  
Trilochan Jana ◽  
...  
Keyword(s):  
Thermal Barrier Coating ◽  
Functionally Graded ◽  
Thermal Barrier ◽  
Laser Glazing ◽  
Barrier Coating ◽  
Ablation Resistance ◽  
O 19 ◽  
Plasma Sprayed

HOT CORROSION OF CERIA-YTTRIA STABILIZED ZIRCONIA PLASMA SPRAYED THERMAL BARRIER COATING BY EUTECTIC VANDIUM PENTAOXIDE-SODIUM SULFATE

2018 ◽  
Vol 18 (1) ◽  
pp. 182-192 ◽  
Author(s):  
Mohammed J Kadhim ◽  
Mohammed H Hafiz ◽  
Maryam A Ali Bash
Keyword(s):  
Thermal Barrier Coating ◽  
Hot Corrosion ◽  
Monoclinic Phase ◽  
Volume Fraction ◽  
High Volume ◽  
Thermal Barrier ◽  
Air Plasma ◽  
Plan View ◽  
Barrier Coating ◽  
Plasma Sprayed

The high temperature corrosion behavior of thermal barrier coating (TBC) systemconsisting of IN-738 LC superalloy substrate, air plasma sprayed Ni24.5Cr6Al0.4Y (wt%)bond coat and air plasma sprayed ZrO2-20 wt% ceria-3.6 wt% yttria (CYSZ) ceramic coatwere characterized. The upper surfaces of CYSZ covered with 30 mg/cm2 , mixed 45 wt%Na2SO4-55 wt% V2O5 salt were exposed at different temperatures from 800 to 1000 oC andinteraction times from 1 up to 8 h. The upper surface plan view of the coatings wereidentified for topography, roughness, chemical composition, phases and reaction productsusing scanning electron microscopy, energy dispersive spectroscopy, talysurf, and X-raydiffraction. XRD analyses of the plasma sprayed coatings after hot corrosion confirmed thephase transformation of nontransformable tetragonal (t') into monoclinic phase, presence ofYVO4 and CeVO4 products. Analysis of the hot corrosion CYSZ coating confirmed theformation of high volume fraction of YVO4, with low volume fractions of CeOV4 and CeO2.The formation of these compounds were combined with formation of monoclinic phase (m)from transformation of nontransformable tetragonal phase (t').

Oxygen Transport Through the Zirconia Top Coat in Thermal Barrier Coating Systems

1998 ◽  
Author(s):  
A.C. Fox ◽  
T.W. Clyne
Keyword(s):  
Thermal Barrier Coating ◽  
Bond Coat ◽  
Ionic Conduction ◽  
Gas Permeability ◽  
Gas Permeation ◽  
Thermal Barrier ◽  
Barrier Coating ◽  
Oxygen Gas ◽  
Plasma Sprayed ◽  
Tbc Systems

Abstract The gas permeability of plasma sprayed yttria-stabilised zirconia coatings has been measured over a range of temperature, using hydrogen and oxygen gas. The permeability was found to be greater for coatings produced with longer stand-off distances, higher chamber pressures and lower torch powers. Porosity levels have been measured using densitometry and microstructural features have been examined using SEM. A model has been developed for prediction of the permeability from such microstructural features, based on percolation theory. Agreement between predicted and measured permeabilities is good. Ionic conduction through the coatings has also been briefly explored. It is concluded that transport of oxygen through the top coat in thermal barrier coating (TBC) systems, causing oxidation of the bond coat, occurs primarily by gas permeation rather than ionic conduction, at least up to temperatures of about 1000°C and probably up to higher temperatures. Top coat permeabilities appreciably below those measured will be required if the rate of bond coat oxidation is to be reduced by cutting the supply of oxygen to the interface.

High-temperature degradation of the in-situ laser-glazed plasma sprayed LaMgAl11O19 thermal barrier coating exposed to Ca-Mg-Al-silicate deposits

2020 ◽  
Vol 176 ◽  
pp. 108934
Author(s):  
Yiwei Sun ◽  
Hengkai Wu ◽  
Hongxu Zhao ◽  
Xiaolong Chen ◽  
Chaoqian Guo ◽  
...  
Keyword(s):  
High Temperature ◽  
Thermal Barrier Coating ◽  
Thermal Barrier ◽  
Barrier Coating ◽  
Plasma Sprayed ◽  
Silicate Deposits
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