Effect of structure and phase composition on thermocyclic stability of thermo-barrier coatings Zr-O deposited by microplasma method on a copper substrate

2018 ◽  
Author(s):  
T. I. Dorofeeva ◽  
T. A. Gubaidulina ◽  
B. P. Gritsenko ◽  
V. P. Sergeev
Keyword(s):  
Phase Composition ◽  
Copper Substrate ◽  
Barrier Coatings ◽  
Effect Of Structure

scholarly journals Phase composition and residual stresses in thermal barrier coatings

2016 ◽  
Vol 729 ◽  
pp. 012017 ◽  
Author(s):  
A A Lozovan ◽  
S Ya Betsofen ◽  
A A Ashmarin ◽  
B V Ryabenko ◽  
S V Ivanova
Keyword(s):  
Phase Composition ◽  
Residual Stresses ◽  
Thermal Barrier Coatings ◽  
Thermal Barrier ◽  
Barrier Coatings

Phase composition and residual stresses in thermal barrier coatings

2015 ◽  
Vol 2015 (10) ◽  
pp. 795-799 ◽  
Author(s):  
S. Ya. Betsofen ◽  
B. V. Ryabenko ◽  
A. A. Ashmarin ◽  
D. E. Molostov
Keyword(s):  
Phase Composition ◽  
Residual Stresses ◽  
Thermal Barrier Coatings ◽  
Thermal Barrier ◽  
Barrier Coatings

Oxidation Behavior of Thermal Barrier Coatings on Copper Substrates

2010 ◽  
Vol 66 ◽  
pp. 74-79
Author(s):  
Jana Schloesser ◽  
Martin Bäker ◽  
Joachim Rösler ◽  
Robert Pulz
Keyword(s):  
Thermal Cycling ◽  
Thermal Barrier Coatings ◽  
Bond Coat ◽  
Thermal Protection ◽  
Rocket Engine ◽  
Copper Substrate ◽  
Thermally Grown Oxide ◽  
Substrate Material ◽  
Thermal Barrier ◽  
Barrier Coatings

In rocket engine combustion chambers, the cooling channels experience extremely high temperatures and environmental attack. Thermal protection can be provided by Thermal Barrier Coatings. Due to the need of good heat conduction, the inner combustion liner is made of copper. The performance of a standard coating system for nickel based substrates is investigated on copper substrates. Thermal cycling experiments are performed on the coated samples. Due to temperature limitations of the copper substrate material, no thermally grown oxide forms at the interface of the thermal barrier coating and the bond coat. Delamination of the coatings occurs at the interface between the substrate and the bond coat due to oxide formation of the copper at uncoated edges. In real service a totally dense coating can probably not be assured which is the reason why this failure mode is of importance. Different parameters are used for thermal cycling to understand the underlying mechanisms of delamination. Furthermore, laser heating experiments account for the high thermal gradient in real service. Pilot tests which led to a delamination of the coating at the substrate interface were performed successfully.

scholarly journals Optimal parameterization in the measurements of the thermal diffusivity of thermal barrier coatings

2007 ◽  
Vol 11 (1) ◽  
pp. 137-156
Author(s):  
Nenad Milosevic
Keyword(s):  
Thermal Diffusivity ◽  
Thermal Barrier Coatings ◽  
Steel Substrate ◽  
Thermal Contact ◽  
Copper Substrate ◽  
Estimation Procedure ◽  
Laser Flash ◽  
Flash Method ◽  
Thermal Barrier ◽  
Barrier Coatings

The paper presents an estimation procedure for the measurement of the thermal diffusivity of thermal barrier coatings deposited on thermal conductive substrates using the laser flash method when the thermal contact resistance between the coating and substrate is unknown. The procedure is based on the application of the optimal parameterization technique and Gauss minimization algorithm. It has been applied on the experimental data obtained by using two different samples, one made of PTFE (polytetrafluoroethylene) coating deposited on a stainless steel substrate and the other made of PVC (polyvinylchloride) deposited on a copper substrate. .

Preparation and Thermophysical Properties of (La0.4Sm0.5Yb0.1)2(Zr0.7Ce0.3)2O7 Ceramic for Thermal Barrier Coatings

2008 ◽  
Vol 368-372 ◽  
pp. 1334-1336
Author(s):  
Ling Liu ◽  
Qiang Xu ◽  
Fu Chi Wang ◽  
Hong Song Zhang
Keyword(s):  
Thermal Conductivity ◽  
Thermal Expansion ◽  
Rare Earth ◽  
Phase Composition ◽  
Thermal Barrier Coatings ◽  
Thermophysical Properties ◽  
Single Phase ◽  
Pyrochlore Structure ◽  
Thermal Barrier ◽  
Barrier Coatings

A complex rare-earth zirconate (La0.4Sm0.5Yb0.1)2(Zr0.7Ce0.3)2O7 powder for thermal barrier coatings (TBCs) was synthesized by coprecipitation method. The phase composition, microstructure and the thermophysical properties were investigated. XRD results revealed that single phase (La0.4Sm0.5Yb0.1)2(Zr0.7Ce0.3)2O7 with pyrochlore structure was prepared and the SEM result showed that the microstructure of the product was dense and no other phases existed among the particles. With the temperature increasing, the thermal expansion coefficient (CTE) of the ceramic increased, while the thermal conductivity decreased. The results indicated that CTE of the ceramic was slightly higher than that of La2Zr2O7 and the thermal conductivity of the ceramic was lower than that of La2Zr2O7. These results imply that (La0.4Sm0.5Yb0.1)2(Zr0.7Ce0.3)2O7 can be explored as the candidate material for the ceramic layer in TBCs system.

Phase composition and thermal conductivity of zirconia-based thermal barrier coatings

2016 ◽  
Vol 52 (8) ◽  
pp. 802-810 ◽  
Author(s):  
I. V. Mazilin ◽  
L. Kh. Baldaev ◽  
D. V. Drobot ◽  
E. Yu. Marchukov ◽  
N. G. Zaitsev
Keyword(s):  
Thermal Conductivity ◽  
Phase Composition ◽  
Thermal Barrier Coatings ◽  
Thermal Barrier ◽  
Barrier Coatings
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