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http://dx.doi.org/10.7736/KSPE.2014.31.12.1155

Evaluation of Effect on Thermal Fatigue Life Considering TGO Growth  

Song, Hyunwoo (School of Mechanical Engineering, Sungkyunkwan University)
Lee, Jeong-Min (School of Mechanical Engineering, Sungkyunkwan University)
Kim, Yongseok (School of Mechanical Engineering, Sungkyunkwan University)
Oh, Chang-Seo (School of Mechanical Engineering, Sungkyunkwan University)
Han, Kyu Chul (School of Mechanical Engineering, Sungkyunkwan University)
Lee, Young-Ze (Department of Mechanical Engineering, Sungkyunkwan University)
Koo, Jae-Mean (Department of Mechanical Engineering, Sungkyunkwan University)
Seok, Chang-Sung (Department of Mechanical Engineering, Sungkyunkwan University)
Publication Information
Journal of the Korean Society for Precision Engineering / v.31, no.12, 2014 , pp. 1155-1159 More about this Journal
Abstract
Thermal barrier coating (TBC) which is used to protect the substrate of gas turbine is exposed to high temperature environment. Because of high temperature environment, thermally grown oxide (TGO) is grown at the interface of thermal barrier coating in operation of gas turbine. The growth of TGO critically affects to durability of TBC, so the evaluation about durability of TBC with TGOs of various thickness is needed. In this research, TGO was inserted by aging of TBC specimen to evaluate the effect of the TGO growth. Then thickness of TGO was defined by microstructure analysis, and thermal fatigue test was performed with these aging specimens. Finally, the relation between thermal fatigue life and the TGO growth according to aging time was obtained.
Keywords
Thermal Barrier Coating; Thermal Fatigue; Degradation; Thermally Grown Oxide; Micro-Structure Analysis;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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