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Thermal barrier coatings issues in advanced land-based gas turbinesThe Department of Energy's Advanced Turbine Systems (ATS) program is aimed at fostering the development of a new generation of land-based gas turbine systems with overall efficiencies significantly beyond those of current state-of-the-art machines, as well as greatly increased times between inspection and refurbishment, improved environmental impact, and decreased cost. The proposed duty cycle of ATS machines will emphasize different criteria in the selection of materials for the critical components. In particular, thermal barrier coatings (TBC's) will be an essential feature of the hot gas path components in these machines. In fact, the goals of the ATS will require significant improvements in TBC technology, since these turbines will be totally reliant on TBC's, which will be required to function on critical components such as the first stage vanes and blades for times considerably in excess of those experienced in current applications. Issues that assume increased importance are the mechanical and chemical stability of the ceramic layer and of the metallic bond coat; the thermal expansion characteristics and compliance of the ceramic layer; and the thermal conductivity across the thickness of the ceramic layer. Obviously, the ATS program provides a very challenging opportunity for TBC's, and involves some significant opportunities to extend this technology. A significant TBC development effort is planned in the ATS program which will address these key issues.
Document ID
19960020875
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Parks, William P.
(Department of Energy Washington, DC United States)
Hoffman, Eugene E.
(Department of Energy Oak Ridge, TN United States)
Lee, Woo Y.
(Oak Ridge National Lab. TN United States)
Wright, Ian G.
(Oak Ridge National Lab. TN United States)
Date Acquired
August 17, 2013
Publication Date
October 1, 1995
Publication Information
Publication: Thermal Barrier Coating Workshop
Subject Category
Nonmetallic Materials
Accession Number
96N24398
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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