Open AccessInvestigation on the Interface Characteristics of the Thermal Barrier Coating System through Flat Cylindrical Indenters
Author(s) -
Wen Shifeng,
Zeng Xiaohu,
Xie Gongnan
Publication year - 2014
Publication title -
advances in mechanical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.318
H-Index - 40
ISSN - 1687-8132
DOI - 10.1155/2014/654096
Subject(s) - materials science , thermal barrier coating , coating , finite element method , composite material , residual stress , surface finish , modulus , stress (linguistics) , layer (electronics) , substrate (aquarium) , thermal , elastic modulus , interface (matter) , surface roughness , structural engineering , engineering , geology , linguistics , philosophy , oceanography , physics , capillary number , capillary action , meteorology
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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