Advanced SearchSearch Tips
Evaluation of Degradation Characteristics of Thermal Barrier Coating on Gas Turbine Blades
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Evaluation of Degradation Characteristics of Thermal Barrier Coating on Gas Turbine Blades
Jung, Yongchan; Kim, Mintae; Lee, Juhyeung; Ahn, Jamin; Kim, Kihong;
  PDF(new window)
In order to evaluate the lifespan of high-temperature parts with thermal barrier coating in gas turbines used for power generation, this study was performed on an 80 MW-class gas turbine exceeding 24 k equivalent operating hours. Degradation characteristics were evaluated by analyzing the YSZ (Yttria Stabilized Zirconia) top coat, which serves as the thermal barrier coating layer, the NiCrAlY bond coat, and interface layers. Microstructural analysis of the top, middle, and bottom sections showed that Thermal Growth Oxide (TGO) growth, Cr precipitate growth within the bond coat layer, and formation of diffusion layer occur actively in high-temperature sections. These microstructural changes were consistent with damaged areas of the thermal barrier coating layer observed at the surface of the used blade. The distribution of Cr precipitates within the bond coat layer, in addition to the thickness of TGO, is regarded as a key indicator in the evaluation of degradation characteristics.
Gas turbine blade;thermal barrier coating;precipitates;metallurgical analysis;
 Cited by
Yong Chan Jung, Tae Hee Lee and Ki Tae Kim, Eng. Fail. Anal. 32, 98-105 (2013). crossref(new window)

Min Tae Kim and Yong Chan Jung, Surf. Coat. Technol., 210, 166-175 (2012). crossref(new window)

Yong Chan Jung and Ki Tae Kim, Met. Mater. Int., 17, 279-282 (2011). crossref(new window)

Yong Chan Jung and Han Sub Chung, Met. Mater. Int., 16, 267-271 (2010). crossref(new window)

Aymeric Raffaitin, Fabrice Crabos, Eric Andrieu, Daniel Monceau, Surf. Coat. Technol., 201, 3829-3835 (2006). crossref(new window)

W.R. Chen, X. Wu, D. Dudzinski, P.C. Patnaik, Surf. Coat. Technol., 200, 5863-5868 (2006). crossref(new window)

B.G. Mendis, B. Tryon, T. M. Pollock, K. J. Hemker, Surf. Coat. Technol., 201, 3918-3925 (2006). crossref(new window)

G. G. Levi, E. Sommer, S. G. Terry, A. Catanoiu, Jour. American Ceramic Society, 86, 676-685 (2006).

W. J. Quadakkers, V. Shemet, D. Sebold, R. Anton, E. Wessel, L. Singheiser, Surf. Coat. Technol., 199, 77-82 (2005). crossref(new window)

B. Wang, J. Gong, C. Sun, R.F. Huang, L.S. Wen, Mater. Sci. Eng., 357, 39-44 (2003). crossref(new window)

Meiheng Li, Xiaofeng Sun, Wangyu Hu, Hengrong Guan, Materials Letters, 61, 5169-5172 (2007). crossref(new window)

C.S. Richard, G. Beranger, J.Lu, J.F. Flavenot, Surf. Coat. Technol., 82, 99-109 (1996). crossref(new window)