Thermal cycling behavior of plasma sprayed segmented thermal barrier coatings

Hongbo Guo, Hideyuki Murakami, Seiji Kuroda

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Thermal barrier coatings (TBCs) with different levels of segmentation crack densities (Ds) were sprayed at different substrate temperatures (Ts). Thermal cycling resistance of the TBC specimen was examined. The segmented coating significantly improved the thermal cycling resistance as compared to the traditional non-segmented coating. Maximum thermal cycling lifetimes were achieved in the coating with a crack density level of 2.2 mm -1. New segmentation cracks were hardly generated during thermal cycling testing. Spallation of segments within the segmented coating occurred, which is different from spallation of the whole coating from substrate in the case of traditional coating. Oxidation of bond coat and limited phase decomposition of YSZ topcoat were considered as not responsible for the failure of TBCs.

Original languageEnglish
Pages (from-to)306-309
Number of pages4
JournalMaterials Transactions
Volume47
Issue number2
DOIs
Publication statusPublished - 2006 Feb 1
Externally publishedYes

Fingerprint

Thermal barrier coatings
Sprayed coatings
Thermal cycling
Plasmas
coatings
Coatings
cycles
Cracks
cracks
spallation
Substrates
yttria-stabilized zirconia
Decomposition
Oxidation
Testing
decomposition
life (durability)
oxidation

Keywords

  • Failure mechanism
  • Plasma spray
  • Segmentation cracks
  • Thermal barrier coatings
  • Thermal cycling

ASJC Scopus subject areas

  • Materials Science(all)
  • Metals and Alloys

Cite this

Thermal cycling behavior of plasma sprayed segmented thermal barrier coatings. / Guo, Hongbo; Murakami, Hideyuki; Kuroda, Seiji.

In: Materials Transactions, Vol. 47, No. 2, 01.02.2006, p. 306-309.

Research output: Contribution to journalArticle

@article{d14ce42ad91b47b594866a1d806a3b9b,
title = "Thermal cycling behavior of plasma sprayed segmented thermal barrier coatings",
abstract = "Thermal barrier coatings (TBCs) with different levels of segmentation crack densities (Ds) were sprayed at different substrate temperatures (Ts). Thermal cycling resistance of the TBC specimen was examined. The segmented coating significantly improved the thermal cycling resistance as compared to the traditional non-segmented coating. Maximum thermal cycling lifetimes were achieved in the coating with a crack density level of 2.2 mm -1. New segmentation cracks were hardly generated during thermal cycling testing. Spallation of segments within the segmented coating occurred, which is different from spallation of the whole coating from substrate in the case of traditional coating. Oxidation of bond coat and limited phase decomposition of YSZ topcoat were considered as not responsible for the failure of TBCs.",
keywords = "Failure mechanism, Plasma spray, Segmentation cracks, Thermal barrier coatings, Thermal cycling",
author = "Hongbo Guo and Hideyuki Murakami and Seiji Kuroda",
year = "2006",
month = "2",
day = "1",
doi = "10.2320/matertrans.47.306",
language = "English",
volume = "47",
pages = "306--309",
journal = "Materials Transactions",
issn = "1345-9678",
publisher = "Japan Institute of Metals (JIM)",
number = "2",

}

TY - JOUR

T1 - Thermal cycling behavior of plasma sprayed segmented thermal barrier coatings

AU - Guo, Hongbo

AU - Murakami, Hideyuki

AU - Kuroda, Seiji

PY - 2006/2/1

Y1 - 2006/2/1

N2 - Thermal barrier coatings (TBCs) with different levels of segmentation crack densities (Ds) were sprayed at different substrate temperatures (Ts). Thermal cycling resistance of the TBC specimen was examined. The segmented coating significantly improved the thermal cycling resistance as compared to the traditional non-segmented coating. Maximum thermal cycling lifetimes were achieved in the coating with a crack density level of 2.2 mm -1. New segmentation cracks were hardly generated during thermal cycling testing. Spallation of segments within the segmented coating occurred, which is different from spallation of the whole coating from substrate in the case of traditional coating. Oxidation of bond coat and limited phase decomposition of YSZ topcoat were considered as not responsible for the failure of TBCs.

AB - Thermal barrier coatings (TBCs) with different levels of segmentation crack densities (Ds) were sprayed at different substrate temperatures (Ts). Thermal cycling resistance of the TBC specimen was examined. The segmented coating significantly improved the thermal cycling resistance as compared to the traditional non-segmented coating. Maximum thermal cycling lifetimes were achieved in the coating with a crack density level of 2.2 mm -1. New segmentation cracks were hardly generated during thermal cycling testing. Spallation of segments within the segmented coating occurred, which is different from spallation of the whole coating from substrate in the case of traditional coating. Oxidation of bond coat and limited phase decomposition of YSZ topcoat were considered as not responsible for the failure of TBCs.

KW - Failure mechanism

KW - Plasma spray

KW - Segmentation cracks

KW - Thermal barrier coatings

KW - Thermal cycling

UR - http://www.scopus.com/inward/record.url?scp=33645780122&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33645780122&partnerID=8YFLogxK

U2 - 10.2320/matertrans.47.306

DO - 10.2320/matertrans.47.306

M3 - Article

VL - 47

SP - 306

EP - 309

JO - Materials Transactions

JF - Materials Transactions

SN - 1345-9678

IS - 2

ER -