Interfacial fracture mechanism associated with mixed oxides growth in thermal barrier coating system

Rong Xu; Xue Ling Fan; Wei Xu Zhang; T. J. Wang

doi:10.1016/j.surfcoat.2014.05.026

Interfacial fracture mechanism associated with mixed oxides growth in thermal barrier coating system

School of Aerospace Engineering

Research output: Contribution to journal › Article › peer-review

56 Scopus citations

Abstract

The interfacial failure mechanism of the thermal barrier coating system (TBCs) was numerically investigated by considering the role of mixed oxides (MO), which was induced by the discontinuous α -Al₂O₃ at the interface between top and bond coatings. It is shown that MO has a significant effect on the interface integrity. High growth rate of MO will induce the initiation and propagation of interface cracks and eventually results in the debonding of ceramic coating. The high coverage ratio of MO at the interface will accelerate the propagation of an interface crack. Therefore, suppressing the formation of MO can effectively improve the durability and performance of TBCs. The results obtained herein can well explain some previous observations in the thermal shock experiments of TBCs and could offer the potential for improving the durability of TBCs.

Original language	English
Pages (from-to)	139-147
Number of pages	9
Journal	Surface and Coatings Technology
Volume	253
DOIs	https://doi.org/10.1016/j.surfcoat.2014.05.026
State	Published - 25 Aug 2014

Keywords

Delamination
Finite element method
TBCs
Thermal barrier coating

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10.1016/j.surfcoat.2014.05.026

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title = "Interfacial fracture mechanism associated with mixed oxides growth in thermal barrier coating system",

abstract = "The interfacial failure mechanism of the thermal barrier coating system (TBCs) was numerically investigated by considering the role of mixed oxides (MO), which was induced by the discontinuous α -Al2O3 at the interface between top and bond coatings. It is shown that MO has a significant effect on the interface integrity. High growth rate of MO will induce the initiation and propagation of interface cracks and eventually results in the debonding of ceramic coating. The high coverage ratio of MO at the interface will accelerate the propagation of an interface crack. Therefore, suppressing the formation of MO can effectively improve the durability and performance of TBCs. The results obtained herein can well explain some previous observations in the thermal shock experiments of TBCs and could offer the potential for improving the durability of TBCs.",

keywords = "Delamination, Finite element method, TBCs, Thermal barrier coating",

author = "Rong Xu and Fan, \{Xue Ling\} and Zhang, \{Wei Xu\} and Wang, \{T. J.\}",

year = "2014",

month = aug,

day = "25",

doi = "10.1016/j.surfcoat.2014.05.026",

language = "英语",

volume = "253",

pages = "139--147",

journal = "Surface and Coatings Technology",

issn = "0257-8972",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Interfacial fracture mechanism associated with mixed oxides growth in thermal barrier coating system

AU - Xu, Rong

AU - Fan, Xue Ling

AU - Zhang, Wei Xu

AU - Wang, T. J.

PY - 2014/8/25

Y1 - 2014/8/25

N2 - The interfacial failure mechanism of the thermal barrier coating system (TBCs) was numerically investigated by considering the role of mixed oxides (MO), which was induced by the discontinuous α -Al2O3 at the interface between top and bond coatings. It is shown that MO has a significant effect on the interface integrity. High growth rate of MO will induce the initiation and propagation of interface cracks and eventually results in the debonding of ceramic coating. The high coverage ratio of MO at the interface will accelerate the propagation of an interface crack. Therefore, suppressing the formation of MO can effectively improve the durability and performance of TBCs. The results obtained herein can well explain some previous observations in the thermal shock experiments of TBCs and could offer the potential for improving the durability of TBCs.

AB - The interfacial failure mechanism of the thermal barrier coating system (TBCs) was numerically investigated by considering the role of mixed oxides (MO), which was induced by the discontinuous α -Al2O3 at the interface between top and bond coatings. It is shown that MO has a significant effect on the interface integrity. High growth rate of MO will induce the initiation and propagation of interface cracks and eventually results in the debonding of ceramic coating. The high coverage ratio of MO at the interface will accelerate the propagation of an interface crack. Therefore, suppressing the formation of MO can effectively improve the durability and performance of TBCs. The results obtained herein can well explain some previous observations in the thermal shock experiments of TBCs and could offer the potential for improving the durability of TBCs.

KW - Delamination

KW - Finite element method

KW - TBCs

KW - Thermal barrier coating

UR - https://www.scopus.com/pages/publications/84904734468

U2 - 10.1016/j.surfcoat.2014.05.026

DO - 10.1016/j.surfcoat.2014.05.026

M3 - 文章

AN - SCOPUS:84904734468

SN - 0257-8972

VL - 253

SP - 139

EP - 147

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

ER -

Interfacial fracture mechanism associated with mixed oxides growth in thermal barrier coating system

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Keywords

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