Microstructures and properties of plasma-sprayed segmented thermal barrier coatings

Hongbo Guo*, Seiji Kuroda, Hideyuki Murakami

*この研究の対応する著者

研究成果: Article査読

123 被引用数 (Scopus)

抄録

Thermal barrier coatings (TBCs) with different levels of segmentation crack density were produced by spraying two types of ZrO2-8Y 2O3 powders. The fused and crushed powder has a greater capability of forming segmented coatings than the hollow sphere (HOSP) one. The highly segmented coatings reveal much lower porosity compared with traditionally sprayed coatings, thereby compromising the property of thermal insulation of TBCs. Microstructure and thermal conductivity of the HOSP coatings are more sensitive to the changes in spray conditions. Segmentation cracks had a strong influence in decreasing Young's modulus of coatings. Fifty hours heat treatment at 1250°C had little effect on the mechanical property of the highly segmented coatings.

本文言語English
ページ(範囲)1432-1439
ページ数8
ジャーナルJournal of the American Ceramic Society
89
4
DOI
出版ステータスPublished - 2006 4月 1
外部発表はい

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 材料化学

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