| EPSRC Reference: |
GR/R47653/01 |
| Title: |
The Generation of Delamination Stresses in Thermal Barrier Coating Systems |
| Principal Investigator: |
Evans, Professor HE |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Project Partners: |
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| Department: |
Metallurgy and Materials |
| Organisation: |
University of Birmingham |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 September 2001 |
Ends: |
31 August 2004 |
Value (£): |
159,112
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| EPSRC Research Topic Classifications: |
| Materials Characterisation |
Materials testing & eng. |
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| EPSRC Industrial Sector Classifications: |
| Aerospace, Defence and Marine |
Manufacturing |
| Energy |
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Summary on Grant Application Form |
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This project, undertaken jointly by the University of Birmingham and Imperial College, will examine the relatively neglected behaviour of thermal barrier coating systems under conditions of low frequency thermal cycling, i.e. of relevance to industrial gas turbines, rather than the high frequency cycling associated with aeroengine operation. Under such conditions, the oxidation performance of the bond coat will be a critical issue and delamination stresses and cracking are expected to develop Isothermally as a consequence of a spatial variation in oxidation rates across the bond coat surface. This intrinsic variation will be studied in this research and also simulated in a controlled manner so that the variation in upward displacement rates within the partially-stabilised zirconia top coat can be measured using markers. In this context, particular attention will be given to a TBC system consisting of a Pt-aluminide bond coat and EB-PVD top coat and, for the first time, an attempt will be made to evaluate the creep properties of this bond coat. These creep properties will be incorporated into finite-element models that can also allow for the dilatation associated with the spatial variation of oxidation growth rates. The predictions of deformation rates within the top coat will be validated against experimental measurements and will form the basis of a quantitative delamination model. This collaborative, multidisciplinary project is designed to be highly complementary in that the experimental activity will be centred at Birmingham and the modelling activity at Imperial. The project is supported by in-kind contributions from Alstom Power and Chromalloy.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.bham.ac.uk |