Comprehensive effects of TGO growth on the stress characteristic and delamination mechanism in lamellar structured thermal barrier coatings

2020 ◽  
Vol 46 (2) ◽  
pp. 2220-2237 ◽  
Author(s):  
Zhi-Yuan Wei ◽  
Hong-Neng Cai
Keyword(s):  
Thermal Barrier Coatings ◽  
Thermal Barrier ◽  
Barrier Coatings ◽  
Tgo Growth

Evaluation of TGO growth in thermal barrier coatings using impedance spectroscopy

Rare Metals ◽  
2011 ◽  
Vol 30 (S1) ◽  
pp. 643-646 ◽  
Author(s):  
Hui Huang ◽  
Chao Liu ◽  
Liyong Ni ◽  
Chungen Zhou
Keyword(s):  
Impedance Spectroscopy ◽  
Thermal Barrier Coatings ◽  
Thermal Barrier ◽  
Barrier Coatings ◽  
Tgo Growth

Isothermal oxidation and TGO growth behavior of NiCoCrAlY-YSZ thermal barrier coatings on a Ni-based superalloy

2020 ◽  
Vol 844 ◽  
pp. 156093
Author(s):  
Jiaqi Shi ◽  
Tiebang Zhang ◽  
Bing Sun ◽  
Bing Wang ◽  
Xuhu Zhang ◽  
...  
Keyword(s):  
Thermal Barrier Coatings ◽  
Isothermal Oxidation ◽  
Growth Behavior ◽  
Thermal Barrier ◽  
Barrier Coatings ◽  
Tgo Growth

scholarly journals Oxidation Simulation of Thermal Barrier Coatings with Actual Microstructures Considering Strength Difference Property and Creep-Plastic Behavior

Coatings ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 338 ◽  
Author(s):  
Chen Lin ◽  
Yijun Chai ◽  
Yueming Li
Keyword(s):  
Mechanical Behavior ◽  
Thermal Barrier Coatings ◽  
Experimental Studies ◽  
Thermally Grown Oxide ◽  
Thermal Barrier ◽  
Plastic Behavior ◽  
Reconstruction Method ◽  
Barrier Coatings ◽  
Strength Difference ◽  
Tgo Growth

A scanning electron microscope (SEM) image based direct finite element (FE) mesh reconstruction method is employed to reflect microstructure features of thermal barrier coatings (TBC). The creep-plastic assumption of thermally grown oxide (TGO) scale and metallic bond coat (BC) as well as the strength difference (SD) property of ceramic top coat (TC) are considered to simulate the mechanical behavior. A diffusion oxidation model considering oxygen consumption is proposed to characterize TGO growth. The oxidation simulation of TBC is carried out under the consideration of actual microstructure features. The results revealed that the interface defects increase the surface-area-to-volume ratio of BC exposed to oxygen anion. This leads to the non-uniform TGO growth, which has also been observed in experimental studies. The microstructures and mechanical behavior strongly affect stress evolution in TBC. The consideration of actual microstructure features and reasonable mechanical behaviors, including the creep-plastic behavior and SD property, is helpful for the accurate evaluation of interface stress.

scholarly journals Restrained TGO growth in YSZ/NiCrAlY thermal barrier coatings by modified laser remelting

2017 ◽  
Vol 309 ◽  
pp. 1119-1125 ◽  
Author(s):  
Changhao Zhao ◽  
Meng Zhao ◽  
Muhammad Shahid ◽  
Min Wang ◽  
Wei Pan
Keyword(s):  
Thermal Barrier Coatings ◽  
Thermal Barrier ◽  
Laser Remelting ◽  
Barrier Coatings ◽  
Tgo Growth
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