Microstructure Evolution, Thermal Properties Improvement and Failure Mechanism of Thermal Barrier Coatings After Shot Peening

2021 ◽  
Author(s):  
Guanxi Liu ◽  
Zaoyu Shen ◽  
Guanghong Huang ◽  
Limin He ◽  
Rende Mu ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Failure Mechanism ◽  
Thermal Barrier Coatings ◽  
Microstructure Evolution ◽  
Shot Peening ◽  
Thermal Barrier ◽  
Barrier Coatings

Design, Preparation and Thermal Properties of (La0.4Sm0.5Yb0.1)2Zr2O7 Ceramic for Thermal Barrier Coatings

2012 ◽  
Vol 512-515 ◽  
pp. 469-473 ◽  
Author(s):  
L. Liu ◽  
Z. Ma ◽  
F.C. Wang ◽  
Q. Xu
Keyword(s):  
Thermal Conductivity ◽  
Thermal Expansion ◽  
Thermal Properties ◽  
Rare Earth ◽  
Thermal Expansion Coefficient ◽  
Thermal Barrier Coatings ◽  
Expansion Coefficient ◽  
Phonon Transport ◽  
Thermal Barrier ◽  
Barrier Coatings

According to the theory of phonon transport and thermal expansion, a new complex rare-earth zirconate ceramic (La0.4Sm0.5Yb0.1)2Zr2O7, with low thermal conductivity and high thermal expansion coefficient, has been designed by doping proper ions at A sites. The complex rare-earth zirconate (La0.4Sm0.5Yb0.1)2Zr2O7 powder for thermal barrier coatings (TBCs) was synthesized by coprecipitation-calcination method. The phase, microstructure and thermal properties of the new material were investigated. The results revealed that single phase (La0.4Sm0.5Yb0.1)2Zr2O7 with pyrochlore structure was synthesized. The thermal conductivity and the thermal expansion coefficient of the designed complex rare-earth zirconate ceramic is about 1.3W/m•K and 10.5×10-6/K, respectively. These results imply that (La0.4Sm0.5Yb0.1)2Zr2O7 can be explored as the candidate material for the ceramic layer in TBCs system.

Failure mechanism of thermal barrier coatings of an ex-service aero-engine combustor

2019 ◽  
Vol 380 ◽  
pp. 125030
Author(s):  
Huwei Dai ◽  
Junhong Zhang ◽  
Yanyan Ren ◽  
Nuohao Liu ◽  
Bin Wu ◽  
...  
Keyword(s):  
Failure Mechanism ◽  
Thermal Barrier Coatings ◽  
Thermal Barrier ◽  
Barrier Coatings ◽  
Aero Engine
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