Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7886960 | Ceramics International | 2018 | 38 Pages |
Abstract
Calcium-magnesium-alumina-silicate (CMAS) attack has been regarded as one of the significant failure mechanisms for thermal barrier coatings (TBCs). In this study, CMAS corrosion behavior of BaLa2Ti3O10, a novel TBC material, is investigated at 1300â¯Â°C and 1350â¯Â°C for 0.5â¯h, 4â¯h, 12â¯h and 24â¯h. Results reveal that BaLa2Ti3O10 has high resistance to molten CMAS infiltration, attributable to the formation of a dense reaction layer. X-ray diffraction, scanning electron microscope, energy dispersive spectroscope, transmission electron microscope confirm that the layer consists of apatite, celsian and perovskite phases. With increased corrosion duration, the layer retains good phase stability and the thickness increases. The formation of corrosion products and the reaction layer are discussed according to a dissolution-reprecipitation mechanism and the optical basicity theory.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Jianxing Yu, Caimei Wang, Lei Guo, Yang Yu, Fuxing Ye, Muyu Li, Huakun Wang, Zhenglong Yang,