| LIU Fei,MAO Jie,DENG Zi-qian,DENG Chun-ming,ZHANG Xiao-feng,DENG Chang-guang,LIU Min.Effects of Thermal Barrier Coatings Prepared by Plasma-spray Physical Vapor Deposition on Air Film Cooling Hole Contraction[J],46(8):21-26 |
| Effects of Thermal Barrier Coatings Prepared by Plasma-spray Physical Vapor Deposition on Air Film Cooling Hole Contraction |
| Received:January 09, 2017 Revised:August 20, 2017 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2017.08.004 |
| KeyWord:plasma spray-physical vapor deposition thermal barrier coating air film cooling hole shrinkage factor of pore size columnar coating hole blockage |
| Author | Institution |
| LIU Fei |
1.School of Materials Science and Engineering, South China University of Technology, Guangzhou , China; 2.Guangdong Institute of New Materials, National Engineering Laboratory for Modern Materials Surface Engineering Technology, Key Laboratory of Guangdong for Modern Surface Engineering Technology, Guangzhou , China |
| MAO Jie |
Guangdong Institute of New Materials, National Engineering Laboratory for Modern Materials Surface Engineering Technology, Key Laboratory of Guangdong for Modern Surface Engineering Technology, Guangzhou , China |
| DENG Zi-qian |
Guangdong Institute of New Materials, National Engineering Laboratory for Modern Materials Surface Engineering Technology, Key Laboratory of Guangdong for Modern Surface Engineering Technology, Guangzhou , China |
| DENG Chun-ming |
Guangdong Institute of New Materials, National Engineering Laboratory for Modern Materials Surface Engineering Technology, Key Laboratory of Guangdong for Modern Surface Engineering Technology, Guangzhou , China |
| ZHANG Xiao-feng |
Guangdong Institute of New Materials, National Engineering Laboratory for Modern Materials Surface Engineering Technology, Key Laboratory of Guangdong for Modern Surface Engineering Technology, Guangzhou , China |
| DENG Chang-guang |
Guangdong Institute of New Materials, National Engineering Laboratory for Modern Materials Surface Engineering Technology, Key Laboratory of Guangdong for Modern Surface Engineering Technology, Guangzhou , China |
| LIU Min |
Guangdong Institute of New Materials, National Engineering Laboratory for Modern Materials Surface Engineering Technology, Key Laboratory of Guangdong for Modern Surface Engineering Technology, Guangzhou , China |
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| Abstract: |
| The work aims to study factors affecting blocking of air film cooling hole during preparation of thermal barrier coating by plasma-spray physical vapor deposition. With agglomerated and sintered ZrO2-7wt%Y2O3(7YSZ) powder as raw material, thermal barrier coatings were prepared by plasma spray-physical vapor deposition (PS-PVD) on superalloy plate substrate with precast air film cooling holes. Effects of parameters including hole angle and pore size of the air film cooling hole on hole blockage were studied. When pore size of the air film cooling hole was controlled within 0.85 mm, shrinkage factor of the pore size was 19.01%, 14.50%, 14.86%, respectively at the angle of 30°, 60°and 90°. Shrinkage factor of the pore size decreased and maintained stable after a while as the angle increased. Both coatings outside and inside the hole were of columnar structure. When the angle of air film cooling hole was 30°, shrinkage factor of the pore size was 36.40%, 31.70% and 24.45%, respectively provided with pore size of 1.0 mm, 1.3 mm and 1.5 mm. The shrinkage factor decreased while distribution depth of the coating in hole increased as the pore size increased. The angle of air film cooling hole will influence deposition efficiency of thermal barrier coatings, and thus affecting shrinkage factor of pore size. Pore size of the air film cooling hole has no effect on deposition efficiency of thermal barrier coatings, but it will affect shrinkage factor of pore size. |
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