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Projects: Projects for Investigator
Reference Number EP/H046976/1
Title Failure Mechanism of High Bonding Strength Thermal Barrier Coatings
Status Completed
Energy Categories Other Power and Storage Technologies(Electric power conversion) 25%;
Energy Efficiency(Industry) 25%;
Fossil Fuels: Oil Gas and Coal(Oil and Gas, Oil and gas combustion) 50%;
Research Types Basic and strategic applied research 100%
Science and Technology Fields PHYSICAL SCIENCES AND MATHEMATICS (Metallurgy and Materials) 100%
UKERC Cross Cutting Characterisation Not Cross-cutting 100%
Principal Investigator Professor P Xiao
No email address given
University of Manchester
Award Type Standard
Funding Source EPSRC
Start Date 01 September 2010
End Date 31 August 2013
Duration 36 months
Total Grant Value £1
Industrial Sectors Manufacturing
Region North West
Programme Materials, Mechanical and Medical Eng
Investigators Principal Investigator Professor P Xiao , Materials, University of Manchester (100.000%)
Web Site
Abstract Thermal barrier coatings are used in the hot sections of gas turbines to safeguard them from the extreme working temperature. The benefits of a durable TBC can lead to more portable yet highly productive, robust, and economical machines with increased power-to-weight ratio and power-specific fuel consumption. Rather than adopting the common approach of using different material compositions, such as adding Hafnium or Tantalum oxides into YSZ, the present proposal suggests a different line of attack. We propose instead to use desirable micro-features on the bond-coat to make a robust and durable TBC. Our working hypothesis is that control of TBC material selections is rather complex. Lack of fundamental understanding to the formulation of new TBC compositions and lack of reliable testing data to support such new TBCs will not lead to real world applications. Therefore, researching a better control of the weakest link of a TBC system, the interface between the bond-coat and the ceramic layer, forms our focus.The overall project objective is to establish the scientific foundation and technological platform for an alternative approach to advanced thermal barrier coatings by employing favorable micro-structures onto the bond-coat of the TBC systems, utilizing the enhanced mechanical locking and stress release mechanisms. Achieving this objective requires, foremost, new scientific research and engineering designs. The PIs aim to answer, critically and quantitatively, the questions of what types of micro-patterning on TBC bond-coat surfaces can most significantly improve the TBC bonding strength and durability. In this project, a thorough scientific understanding of the nature of TBC spallation and degradation mechanisms will be found; a novel approach, using EPP, to generate desirable micro-features on the bond-coat will be developed, and thus lead to a robust and durable TBC. A new High Temperature/High Pressure/ TBC Durability Test Rig will be developed to provide direct validation to this novel TBC design. The wide scope of research proposed here has not been conducted before, and is necessary for reaching conclusive answers to these questions
Publications (none)
Final Report (none)
Added to Database 03/11/11