| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5440823 | Journal of the European Ceramic Society | 2016 | 7 Pages |
Abstract
The microstructure and property of plasma-sprayed Al2O3-Y3Al5O12 (YAG) composite coatings were investigated. The sprayable feedstock was composed of Al2O3/Y2O3 granules obtained from the spray drying. As-sprayed Al2O3-YAG composite coating showed obvious amorphous characteristics. Post-heat treatment facilitated the complete crystallization of the Al2O3-YAG composite coating. The heat-treated Al2O3-YAG ceramic coating possessed the deposition microstructure comprising three-dimensional interpenetrating network of α-Al2O3/YAG eutectic phases, which is very similar to the directional solidification microstructure of Al2O3/YAG eutectic bulk ceramics. This eutectic coating microstructure does not correspond to a traditional eutectic microstructure. Al2O3-YAG ceramic coating with eutectic composition is obtained from the crystallization of an amorphous solid ceramic instead of the solidification of the liquid. Furthermore, the plasma-sprayed Al2O3-YAG eutectic ceramic coating with the heat treatment exhibits excellent microstructure and performance stabilities under high temperature.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Kai Yang, Jian Rong, Jingwei Feng, Yin Zhuang, Shunyan Tao, Chuanxian Ding,