Damage evaluation of TBC by rapid thermal cycling test utilizing a laser irradiation

Yusuke Hayashi, Kento Suzuki, Masayuki Arai, Kiyohiro Ito, Tsuyoshi Higuchi, Yuka Suzuki, Tatsuo Suidzu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Thermal barrier coating (TBC) is deposited onto the gas turbine blade surface in order to protect the substrate from high-temperature combustion gas. Cracks and delamination of the ceramic coating which come from high heat flux loading are serious problem in TBC. In this study, the rapid thermal cycling device utilizing laser irradiation was developed. It was then investigated how the damage progresses in the ceramic coating exposed to cyclic rapid thermal loading. As a result, a sintering layer was formed in the surface of the ceramic coating, although such phenomenon was not recognized in TBC sample tested by the conventional thermal cycling test using an electric furnace. It was also revealed from the cross-sectional observation that the vertical crack was initiated at the surface of TBC and propagated into sintering layer. Finally, mechanical factors of those damages from finite element analysis using the TBC model including sintering progress was discussed.

Original languageEnglish
Title of host publicationAdvances in Fracture and Damage Mechanics XVIII
EditorsS.A. Paipetis, Ferri M.H. Aliabadi
PublisherTrans Tech Publications Ltd
Pages361-366
Number of pages6
ISBN (Print)9783035715866
DOIs
Publication statusPublished - 1 Jan 2020
Event18th International Conference on Fracture and Damage Mechanics, FDM 2019 - Rhodes, Greece
Duration: 16 Sep 201918 Sep 2019

Publication series

NameKey Engineering Materials
Volume827 KEM
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Conference

Conference18th International Conference on Fracture and Damage Mechanics, FDM 2019
CountryGreece
CityRhodes
Period16/09/1918/09/19

Keywords

  • Finite Element Analysis
  • Gas Turbine
  • Laser irradiation
  • Thermal Barrier Coatings

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