Segmentation cracks in plasma sprayed thin thermal barrier coatings

Hongbo Guo, Hideyuki Murakami, Seiji Kuroda

研究成果: Conference contribution

3 被引用数 (Scopus)

抄録

Thick thermal barrier coatings (TBCs) containing segmentation cracks have seen a successful application in combustion chamber parts. In this work, rather thin TBCs were produced by spraying yttria stabilized zirconia (YSZ) coatings onto two kinds of bond coats: CoNiCrAlY and Pt-Ir. The effects of process parameters including substrate temperature on the density of segmentation cracks were studied. The thermal cycling performance and failure mechanisms of the segmented thin TBCs were also investigated. The coating sprayed at 1073 K contains a segmentation crack density of approximately 5 mm-1. The segmented coatings significantly improved the thermal cycling lifetime as compared with the non-segmented coatings. The segmented TBC with Pt-Ir bond coat attained a lifetime of more than 5000 cycles (each cycle includes 3 minute heating up to the maximum temperature and 7 minute holding at the temperature), revealing an excellent thermal cycling performance.

本文言語English
ホスト出版物のタイトルAdvanced Ceramic Coatings and Interfaces - A Collection of Papers Presented at the 30th International Conference on Advanced Ceramics and Composites
ページ17-27
ページ数11
3
出版ステータスPublished - 2006 12 1
外部発表はい
イベントAdvanced Ceramic Coatings and Interfaces - 30th International Conference on Advanced Ceramics and Composites - Cocoa Beach, FL, United States
継続期間: 2006 1 222006 1 27

出版物シリーズ

名前Ceramic Engineering and Science Proceedings
番号3
27
ISSN(印刷版)0196-6219

Other

OtherAdvanced Ceramic Coatings and Interfaces - 30th International Conference on Advanced Ceramics and Composites
CountryUnited States
CityCocoa Beach, FL
Period06/1/2206/1/27

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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