| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8955323 | Corrosion Science | 2018 | 31 Pages |
Abstract
The interface oxidation induced microstructural evolution of air plasma spayed (APS) thermal barrier coatings (TBCs) is investigated. As the oxidation progresses, the thermally grown oxide (TGO) formed at the YSZ/NiCrAlY interface develops from a bi-layered structure, to a three-layered structure, then to a four-layered structure of Al2O3, Y3Al5O12 (YAG), NiCr2O4 and NiO, respectively. An oxidation mechanism is proposed to account for the growth of the layered TGO. The YAG formation consumes the underlying alumina layer and facilitates the outward diffusion of Cr and Ni, leading to a detrimental effect on the TBC life.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Yao Hu, Canying Cai, Yanguo Wang, Hongchun Yu, Yichun Zhou, Guangwen Zhou,