The impact of the growth of thermally grown oxide layer on the propagation of surface cracks within thermal barrier coatings

2017 ◽  
Vol 309 ◽  
pp. 1033-1044 ◽  
Author(s):  
JunNan Lv ◽  
XueLing Fan ◽  
Qun Li
Keyword(s):  
Oxide Layer ◽  
Thermal Barrier Coatings ◽  
Thermally Grown Oxide ◽  
Thermal Barrier ◽  
Surface Cracks ◽  
Barrier Coatings ◽  
The Impact ◽  
Thermally Grown

Formation and Growth Behaviour of Thermally Grown Oxide Layer in Thermal Barrier Coatings with HVOF Sprayed Nickel-Chromium Bond Coats

2020 ◽  
Vol 9 (2) ◽  
pp. 1-8
Author(s):  
Abdullah Selim Parlakyigit ◽  
Dervis Ozkan ◽  
Mecit Oge ◽  
Yasin Ozgurluk ◽  
Kadir Mert Doleker ◽  
...  
Keyword(s):  
Oxide Layer ◽  
Thermal Barrier Coatings ◽  
Thermally Grown Oxide ◽  
Thermal Barrier ◽  
Growth Behaviour ◽  
Barrier Coatings ◽  
Bond Coats ◽  
Nickel Chromium ◽  
Thermally Grown

scholarly journals Growth Behavior of Thermally Grown Oxide Layer with Bond Coat Species in Thermal Barrier Coatings

2018 ◽  
Vol 55 (4) ◽  
pp. 344-351
Author(s):  
Sung Hoon Jung ◽  
Soo Hyeok Jeon ◽  
Hyeon-Myeong Park ◽  
Yeon Gil Jung ◽  
Sang Won Myoung ◽  
...  
Keyword(s):  
Oxide Layer ◽  
Thermal Barrier Coatings ◽  
Bond Coat ◽  
Thermally Grown Oxide ◽  
Growth Behavior ◽  
Thermal Barrier ◽  
Barrier Coatings ◽  
Thermally Grown

Determination of the Structure and Chemistry of Thermally Grown Oxides in Thermal Barrier Coatings

1999 ◽  
Vol 5 (S2) ◽  
pp. 854-855
Author(s):  
M.R. Brickey ◽  
J.L. Lee
Keyword(s):  
Thermal Barrier Coatings ◽  
Nickel Aluminide ◽  
Physical Vapor Deposition ◽  
Thermal Exposure ◽  
Thermally Grown Oxide ◽  
Thermal Barrier ◽  
Engine Operation ◽  
Barrier Coatings ◽  
Combustion Gas ◽  
Thermally Grown

Thermal barrier coatings (TBCs) insulate gas turbine hot section components from the hot (∽1200 - 1450°C) combustion gas exhaust stream. An airline company can save millions of dollars per year by using TBCs to protect vital engine components and to improve fuel efficiency. TBCs typically consist of an 8 wt.% yttria-partially-stabilized zirconia (YPSZ) ceramic topcoat deposited on a platinum-nickel-aluminide (Pt-Ni-Al) bondcoat covering a nickel-based superalloy substrate. Thermal exposure during YPSZ electron beam-physical vapor deposition (EB-PVD) and engine operation promotes the formation of a thermally grown oxide (TGO) between the Pt-Ni-Al and the YPSZ layers. Stresses can develop at the Pt-Ni-Al/TGO and TGO/YPSZ interfaces due to TGO growth and thermal expansion coefficient mismatch. These stresses eventually cause spallation of the YPSZ, leaving the metallic substrate vulnerable to high temperature degradation since exhaust temperatures are often higher than the melting temperature of most nickel-based superalloys (∽1200 - 1450°C).

Sign in / Sign up

Export Citation Format

Share Document