Thermal cycling behavior of plasma sprayed segmented thermal barrier coatings

Hongbo Guo, Hideyuki Murakami, Seiji Kuroda

研究成果: Article査読

31 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)306-309
ページ数4
ジャーナルMaterials Transactions
47
2
DOI
出版ステータスPublished - 2006 2
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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