Development of a micromechanical life prediction model for plasma sprayed thermal barrier coatings

2001 ◽  
Vol 303 (1-2) ◽  
pp. 100-109 ◽  
Author(s):  
R. Vaßen ◽  
G. Kerkhoff ◽  
D. Stöver
Keyword(s):  
Prediction Model ◽  
Thermal Barrier Coatings ◽  
Life Prediction ◽  
Thermal Barrier ◽  
Barrier Coatings ◽  
Plasma Sprayed ◽  
Life Prediction Model

A LIFE PREDICTION MODEL OF THERMAL BARRIER COATINGS

2010 ◽  
Vol 24 (15n16) ◽  
pp. 3161-3166 ◽  
Author(s):  
LIYONG NI ◽  
CHAO LIU ◽  
CHUNGEN ZHOU
Keyword(s):  
Crack Propagation ◽  
Prediction Model ◽  
Thermal Barrier Coatings ◽  
Life Prediction ◽  
Crack Propagation Rate ◽  
Thermal Barrier ◽  
Critical Crack ◽  
Critical Crack Length ◽  
Barrier Coatings ◽  
Life Prediction Model

The durability and reliability of thermal barrier coatings(TBCs) have become a major concern of hot-section components due to lack of a reliable life prediction model. In this paper, it is found that the failure location of TBCs is at the TBC/TGO interface by a sequence of crack propagation and coalescence process. The critical crack length of failure samples is 8.8mm. The crack propagation rate is 3-10µm/cycle at the beginning and increases largely to 40µm/cycle near coating failure. A life prediction model based a simple fracture mechanics approach is proposed.

Microstructure-Based Life Prediction of Thermal Barrier Coatings

2013 ◽  
Vol 592-593 ◽  
pp. 413-416 ◽  
Author(s):  
Robert Eriksson ◽  
Kang Yuan ◽  
Sten Johansson ◽  
Ru Lin Peng
Keyword(s):  
Thermal Barrier Coatings ◽  
Gas Turbines ◽  
Life Prediction ◽  
Prediction Models ◽  
Atmospheric Plasma ◽  
Thermal Barrier ◽  
Barrier Coatings ◽  
Al Content ◽  
Β Phase ◽  
Plasma Sprayed

The widespread use of thermal barrier coatings (TBC) in gas turbines stresses the importance of accurate life prediction models for TBCs. During service, the TBC may fail due to thermal fatigue or through the formation of thermally grown oxides (TGOs). The current paper presents a Thermo-Calc/Dictra-based approach to life prediction of isothermally oxidised atmospheric plasma sprayed (APS) TBCs. The β-phase depletion of the coating was predicted and compared to life prediction criteria based on TGO thickness and Al content in the coating. All tried life models underestimated the life of the coating where the β-depletion-based model was the most conservative.

Progress in Thermal Barrier Coatings for Gas Turbine Engines

2014 ◽  
Vol 941-944 ◽  
pp. 1625-1628 ◽  
Author(s):  
Hong Xun Wang ◽  
Wei Fang Zhang ◽  
Tian Jiao Liu
Keyword(s):  
Thermal Barrier Coatings ◽  
Life Prediction ◽  
Turbine Engines ◽  
Thermal Barrier ◽  
Gas Turbine Engines ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Barrier Coatings ◽  
Non Destructive ◽  
Life Prediction Model

In recent years, the key research on thermal barrier coatings (TBCs) lies in the performance improvement of materials as well as structure and process improvement, and achieves new progresses. The difficulty is application of reliability in TBCs. Researchers are exploring that employing non-destructive testing (NDT) and life prediction model on TBCs to conduct a comprehensive and real-time detection and predict the life, so as to improve the safety of TBCs in service process.

scholarly journals An image-based model for the sintering of air plasma sprayed thermal barrier coatings

2021 ◽  
Vol 206 ◽  
pp. 116649
Author(s):  
Xun Zhang ◽  
Alan C.F. Cocks ◽  
Yoshifumi Okajima ◽  
Kazuma Takeno ◽  
Taiji Torigoe
Keyword(s):  
Thermal Barrier Coatings ◽  
Thermal Barrier ◽  
Air Plasma ◽  
Barrier Coatings ◽  
Plasma Sprayed
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