Effects of interface roughness on the life estimation of a thermal barrier coating layer

2013 ◽  
Vol 7 (3) ◽  
pp. 269 ◽  
Author(s):  
R. Ragupathy ◽  
S.K. Panigrahi ◽  
R.K. Mishra
Keyword(s):  
Thermal Barrier Coating ◽  
Coating Layer ◽  
Interface Roughness ◽  
Thermal Barrier ◽  
Life Estimation ◽  
Barrier Coating

Classification of defects in a thermal barrier coating layer using the fuzzy C-means algorithm

2015 ◽  
Vol 16 (1) ◽  
pp. 53-57 ◽  
Author(s):  
Pyeong-Ho Kim ◽  
Jeong-Suk Kim ◽  
Jin-Hyo Park ◽  
Ku-Hyeun Lee ◽  
Yo-Seung Song ◽  
...  
Keyword(s):  
Thermal Barrier Coating ◽  
Coating Layer ◽  
Thermal Barrier ◽  
Fuzzy C Means ◽  
Barrier Coating ◽  
Fuzzy C Means Algorithm

scholarly journals Crack Initiation Strength of Thermal Barrier Coating Layer under Thermal Shock.

2001 ◽  
Vol 50 (3) ◽  
pp. 297-302 ◽  
Author(s):  
Masayuki ARAI ◽  
Toshio SAKUMA ◽  
Uichi IWATA ◽  
Masahiro SAITOH
Keyword(s):  
Crack Initiation ◽  
Thermal Shock ◽  
Thermal Barrier Coating ◽  
Coating Layer ◽  
Thermal Barrier ◽  
Barrier Coating

Mechanisms of Degradation and Failure in a Plasma-Deposited Thermal Barrier Coating

1990 ◽  
Vol 112 (4) ◽  
pp. 521-526 ◽  
Author(s):  
J. T. DeMasi-Marcin ◽  
K. D. Sheffler ◽  
S. Bose
Keyword(s):  
Thermal Barrier Coating ◽  
Damage Accumulation ◽  
Ceramic Coating ◽  
Coating Layer ◽  
Thermal Exposure ◽  
Ceramic Layer ◽  
Constitutive Behavior ◽  
Thermal Barrier ◽  
Accumulation Process ◽  
Barrier Coating

Failure of a two-layer plasma-deposited thermal barrier coating is caused by cyclic thermal exposure and occurs by spallation of the outer ceramic layer. Spallation life is quantitatively predictable, based on the severity of cyclic thermal exposure. This paper describes and attempts to explain unusual constitutive behavior observed in the insulative ceramic coating layer, and presents details of the ceramic cracking damage accumulation process, which is responsible for spallation failure. Comments also are offered to rationalize the previously documented influence of interfacial oxidation on ceramic damage accumulation and spallation life.

scholarly journals Investigation on the Interface Characteristics of the Thermal Barrier Coating System through Flat Cylindrical Indenters

2014 ◽  
Vol 6 ◽  
pp. 654096
Author(s):  
Shifeng Wen ◽  
Xiaohu Zeng ◽  
Gongnan Xie
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Thermal Barrier Coating ◽  
Thermally Grown Oxide ◽  
Interface Roughness ◽  
Thermal Barrier ◽  
The Finite Element Method ◽  
Barrier Coating ◽  
Interface Characteristics ◽  
Prolonged Heat

Thermal barrier coating (TBC) systems are highly advanced material systems and usually applied to insulate components from large and prolonged heat loads by utilizing thermally insulating materials. In this study, the characteristics of the interface of thermal barrier coating systems have been simulated by the finite-element method (FEM). The emphasis was put on the stress distribution at the interface which is beneath the indenter. The effect of the interface roughness, the thermally grown oxide (TGO) layer's thickness, and the modulus ratio (η) of the thin film with the substrate has been considered. Finite-element results showed that the influences of the interface roughness and the TGO layer's thickness on stress distribution were important. At the same time, the residual stress distribution has been investigated in detail.

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