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http://dx.doi.org/10.7736/KSPE.2013.30.8.802

Top Coating Design Technique for Thermal Barrier of Gas Turbine  

Koo, Jae-Mean (School of Mechanical Engineering, Sungkyunkwan Univ.)
Lee, Si-Young (Graduate School of Mechanical Engineering, Sungkyunkwan Univ.)
Seok, Chang-Sung (School of Mechanical Engineering, Sungkyunkwan Univ.)
Publication Information
Journal of the Korean Society for Precision Engineering / v.30, no.8, 2013 , pp. 802-808 More about this Journal
Abstract
Thermal barrier coating (TBC) is used to protect substrates and extend the operating life of gas turbines in power plant and aeronautical applications. The major causes of failure of such coatings is spallation, which results from thermal stress due to a thermal expansion coefficient mismatch between the top coating and the bond coating layers. In this paper, the effects of the material properties and the thickness of the top coating layer on thermal stresses were evaluated using the finite element method and the equation for the thermal expansion coefficient mismatch stress. In addition, we investigated a design technique for the top coating whereby thermal resistance is exploited.
Keywords
Thermal Barrier Coating; Finite Element Analysis; Thermal Stress; Thermal Barrier Performance; Thermal Resistance;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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