OS1204-136 High Temperature Crack Propagation Behavior of Ceramic Thermal Barrier Coatings by In-situ Observation

2015 ◽  
Vol 2015 (0) ◽  
pp. _OS1204-13-_OS1204-13
Author(s):  
Tomohiro ONO ◽  
Masayuki ARAI ◽  
Tatsuo SUIDZU
Keyword(s):  
High Temperature ◽  
Crack Propagation ◽  
Thermal Barrier Coatings ◽  
Thermal Barrier ◽  
In Situ Observation ◽  
Barrier Coatings ◽  
Propagation Behavior ◽  
Crack Propagation Behavior ◽  
Temperature Crack

scholarly journals A Simulation Study on the Crack Propagation Behavior of Nanostructured Thermal Barrier Coatings with Tailored Microstructure

Coatings ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 722
Author(s):  
Lei Zhang ◽  
Yu Wang ◽  
Wei Fan ◽  
Yuan Gao ◽  
Yiwen Sun ◽  
...  
Keyword(s):  
Tensile Stress ◽  
Crack Propagation ◽  
Thermal Barrier Coatings ◽  
Element Model ◽  
Nano Particles ◽  
Thermal Barrier ◽  
Barrier Coatings ◽  
Propagation Behavior ◽  
Stress Zone ◽  
Crack Propagation Behavior

The initiation and propagation of cracks are crucial to the reliability and stability of thermal barrier coatings (TBCs). It is important and necessary to develop an effective method for the prediction of the crack propagation behavior of TBCs. In this study, an extended finite element model (XFEM) based on the real microstructure of nanostructured TBCs was built and employed to elucidate the correlation between the microstructure and crack propagation behavior. Results showed that the unmelted nano-particles (UNPs) that were distributed in the nanostructured coating had an obvious “capture effect” on the cracks, which means that many cracks easily accumulated in the tensile stress zone of the adjacent UNPs and a complex microcrack network formed at their periphery. Arbitrarily oriented cracks mainly propagated parallel to the x-axis at the final stage of thermal cycles and the tensile stress was the main driving force for the spallation failure of TBCs. Correspondingly, I and I–II mixed types of cracks are the major cracking patterns.

1447 In-situ observation of crack-healing effects on crack propagation behavior in Si_3N_4/SiC

2008 ◽  
Vol 2008.1 (0) ◽  
pp. 301-302
Author(s):  
Yasuto NAGOSHI ◽  
Yuta UENO ◽  
Koji TAKAHASHI ◽  
Kotoji ANDO ◽  
Shinji SAITO
Keyword(s):  
Crack Propagation ◽  
In Situ Observation ◽  
Crack Healing ◽  
Propagation Behavior ◽  
Crack Propagation Behavior

In Situ High Temperature XRD Studies of Molten Natural CMAS Corrosion on Thermal Barrier Coatings

2021 ◽  
pp. 101-104
Author(s):  
S. H. Lim ◽  
C. S. Chua ◽  
Brian T. M. Ong ◽  
Coryl Jing Jun Lee ◽  
Dennis Cheng Cheh Tan ◽  
...  
Keyword(s):  
High Temperature ◽  
Thermal Barrier Coatings ◽  
Thermal Barrier ◽  
Barrier Coatings ◽  
High Temperature Xrd ◽  
Xrd Studies
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