CMAS damage in thermal barrier coatings: an exploration via single crystal bulk YSZ specimen

• HAYASHI Yuki

  Graduate School of Mechanical Engineering, Nagaoka University of Technology

• LOKACHARI Siddharth

  Graduate School of Mechanical Engineering, Nagaoka University of Technology

• YAMAGISHI Satoshi

  Department of Mechanical Engineering, Nagaoka University of Technology

• OKAZAKI Masakazu

  Department of Mechanical Engineering, Nagaoka University of Technology

抄録

More recently a new type of damage has been pronounced in thermal barrier coatings (TBCs) by calcium-magnesium-alumino-silicates (CMAS) from ingestion of siliceous minerals under certain operating conditions. In order to understand material aspect of CMAS damage, a study on material interaction between molten CMAS and yttria-stabilized zirconia (YSZ) was carried out by using a single crystal YSZ material and a synthetic CMAS product in this work. Here the effect of crystallographic orientation on the interaction was also investigated. The CMAS-covered single crystal bulk YSZ specimens were isothermally exposed at high temperature. The experimental works clearly showed that interaction between the molten CMAS and YSZ was significant resulting in the change in microstructural morphology and composition of YSZ. The extent of interaction between CMAS and YSZ depended on the crystallographic plane of the YSZ: it was the lowest in the {111} crystallographic plane.

収録刊行物

• Mechanical Engineering Letters

  Mechanical Engineering Letters 2 (0), 16-00240-16-00240, 2016

  一般社団法人 日本機械学会

キーワード

• Calcium-magnesium-alumino-silicates
• Thermal barrier coatings
• Single crystal yittria-stabilized zirconia
• Interaction
• Crystallographic plane

詳細情報

• CRID: 1390282680739427328
• NII論文ID: 130005156298
• DOI: 10.1299/mel.16-00240
• ISSN: 21895236
• Web Site: https://www.jstage.jst.go.jp/article/mel/2/0/2_16-00240/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可