The Effect of the Thermal Barrier Coating on the Displacement Instability in Thermal Barrier Systems

Anette M Karlsson; T. Xu; A. G. Evans

doi:10.1016/S1359-6454(01)00422-0

The Effect of the Thermal Barrier Coating on the Displacement Instability in Thermal Barrier Systems

Anette M Karlsson
, T. Xu
, A. G. Evans

Princeton University

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

Abstract

Thermal barrier systems are susceptible to instability of the thermally grown oxide (TGO) at the interface between the bond coat and the thermal barrier coating (TBC). The instabilities have been linked to thermal cycling and initial geometrical imperfections, as well as to misfit strains due to both oxide growth and thermal expansion misfit. Numerical simulations are used to investigate the role of the thermo-mechanical properties of the TBC in this instability. It is found that the TBC constrains the deformation, whereupon instabilities develop preferentially in regions where crack-like imperfections either pre-exist in the TBC or are created because of the induced stresses.

Original language	American English
Journal	Acta Materialia
Volume	50
DOIs	https://doi.org/10.1016/S1359-6454(01)00422-0
State	Published - Mar 14 2002

Keywords

Multilayers; Oxidation; Plastic; Thermal cycling; Thermal barrier coating

Disciplines

Mechanical Engineering

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10.1016/S1359-6454(01)00422-0License: CC BY

The Effect of the Thermal Barrier Coating on the Displacement InsFinal published version, 1.36 MBLicense: CC BY

http://journals.ohiolink.edu/ejc/article.cgi?issn=13596454&issue=v50i0005&article=1211_teottbdiitbs

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title = "The Effect of the Thermal Barrier Coating on the Displacement Instability in Thermal Barrier Systems",

abstract = " Thermal barrier systems are susceptible to instability of the thermally grown oxide (TGO) at the interface between the bond coat and the thermal barrier coating (TBC). The instabilities have been linked to thermal cycling and initial geometrical imperfections, as well as to misfit strains due to both oxide growth and thermal expansion misfit. Numerical simulations are used to investigate the role of the thermo-mechanical properties of the TBC in this instability. It is found that the TBC constrains the deformation, whereupon instabilities develop preferentially in regions where crack-like imperfections either pre-exist in the TBC or are created because of the induced stresses.",

keywords = "Multilayers; Oxidation; Plastic; Thermal cycling; Thermal barrier coating",

author = "Karlsson, \{Anette M\} and T. Xu and Evans, \{A. G.\}",

note = "Karlsson, A., Xu, T., and Evans, A., 2002, {"}The Effect of the Thermal Barrier Coating on the Displacement Instability in Thermal Barrier Systems,{"} Acta Materialia, 50(5) pp. 1211-1218.",

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AU - Karlsson, Anette M

AU - Xu, T.

AU - Evans, A. G.

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PY - 2002/3/14

Y1 - 2002/3/14

N2 - Thermal barrier systems are susceptible to instability of the thermally grown oxide (TGO) at the interface between the bond coat and the thermal barrier coating (TBC). The instabilities have been linked to thermal cycling and initial geometrical imperfections, as well as to misfit strains due to both oxide growth and thermal expansion misfit. Numerical simulations are used to investigate the role of the thermo-mechanical properties of the TBC in this instability. It is found that the TBC constrains the deformation, whereupon instabilities develop preferentially in regions where crack-like imperfections either pre-exist in the TBC or are created because of the induced stresses.

AB - Thermal barrier systems are susceptible to instability of the thermally grown oxide (TGO) at the interface between the bond coat and the thermal barrier coating (TBC). The instabilities have been linked to thermal cycling and initial geometrical imperfections, as well as to misfit strains due to both oxide growth and thermal expansion misfit. Numerical simulations are used to investigate the role of the thermo-mechanical properties of the TBC in this instability. It is found that the TBC constrains the deformation, whereupon instabilities develop preferentially in regions where crack-like imperfections either pre-exist in the TBC or are created because of the induced stresses.

KW - Multilayers; Oxidation; Plastic; Thermal cycling; Thermal barrier coating

UR - https://engagedscholarship.csuohio.edu/enme_facpub/147

U2 - 10.1016/S1359-6454(01)00422-0

DO - 10.1016/S1359-6454(01)00422-0

M3 - Article

VL - 50

JO - Acta Materialia

JF - Acta Materialia

ER -

The Effect of the Thermal Barrier Coating on the Displacement Instability in Thermal Barrier Systems

Abstract

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