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In Situ Measurement of the Toughness of the Interface Between a Thermal Barrier Coating and a Ni Alloy
Eberl C; Wang X; Gianola DS; Nguyen TD; He MY; Evans AG; Hemker KJ; Eberl, C (reprint author), Johns Hopkins Univ, Dept Mech Engn, Baltimore, MD 21218 USA
Source PublicationJournal of The American Ceramic Society
2011
Volume94Pages:S120-S127
ISSN0002-7820
AbstractA flexural test for the in situ measurement of the delamination toughness of the interface between a thermally grown oxide and a bond coat in the presence of a thermal barrier coating (TBC) has been implemented. To accomplish the testing, a section of the substrate was removed by microelectro-discharge machining and a precrack introduced through the TBC by center point loading. This was followed by application of an asymmetric single-point load to extend a delamination along the interface. A displacement and strain mapping method was used to locate the delamination and to ascertain its extension. To relate the energy release rate and mode mixity to the crack extension and the loads, a finite-element method was implemented. The ensuing fracture resistance was found to vary along the interface with values in the range of 25-95 J/m(2).
KeywordBimaterial Interfaces Mechanical-properties Systems Delamination Adhesion Behavior Cracks
Subject AreaMaterials Science
DOI10.1111/j.1551-2916.2011.04588.x
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000292209200013
WOS KeywordBIMATERIAL INTERFACES ; MECHANICAL-PROPERTIES ; SYSTEMS ; DELAMINATION ; ADHESION ; BEHAVIOR ; CRACKS
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics
Funding OrganizationThis work was supported by AFOSR under the MEANS-2 Program (Grant No. FA9550-05-1-0173) and by ONR (Grant No. N00014-08-1-0454).The authors would like to thank J. Hutchinson for creative and enlightening discussions that allowed this technique to come to fruition. We also thank M. Maloney and D. Litton of Pratt and Whitney (USA) for providing the specimens, S. Faulhaber for preparing the disk specimens, J. Mraz (Smaltec) for fabricating the microbeam specimens, and W. Sharpe, Jr. and J. Sharon for technical support. C. E. would like to acknowledge financial support from the German Science Foundation (SFB499/3-2007 N01).
Department非线性力学国家重点实验室
Classification一类
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/44926
Collection非线性力学国家重点实验室
Corresponding AuthorEberl, C (reprint author), Johns Hopkins Univ, Dept Mech Engn, Baltimore, MD 21218 USA
Recommended Citation
GB/T 7714
Eberl C,Wang X,Gianola DS,et al. In Situ Measurement of the Toughness of the Interface Between a Thermal Barrier Coating and a Ni Alloy[J]. Journal of The American Ceramic Society,2011,94:S120-S127
APA Eberl C.,Wang X.,Gianola DS.,Nguyen TD.,He MY.,...&Eberl, C .(2011).In Situ Measurement of the Toughness of the Interface Between a Thermal Barrier Coating and a Ni Alloy.Journal of The American Ceramic Society,94,S120-S127.
MLA Eberl C,et al."In Situ Measurement of the Toughness of the Interface Between a Thermal Barrier Coating and a Ni Alloy".Journal of The American Ceramic Society 94(2011):S120-S127.
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