| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5440036 | Corrosion Science | 2017 | 9 Pages |
Abstract
Calcium-magnesium-alumino-silicate (CMAS) attack is a significant failure mechanism for thermal barrier coatings (TBC). In this study, La2(Zr0.7Ce0.3)2O7 (LZ7C3) TBC prepared by electron-beam physical vapor deposition was found to be highly effective in resisting CMAS infiltration for prolonged durations (24 h, 1250 °C), while conventional Y2O3-stabilized ZrO2 TBC was completely penetrated by molten CMAS within 30 min. This resistance was achieved through crystallization of CMAS as a result of high-temperature chemical interactions between LZ7C3 coating and CMAS glass. The crystalline products, mainly consisted of La-Ce apatite and C-ZrO2, tended to form a sealing layer and can effectively prevent CMAS from further infiltration.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Xin Zhou, Limin He, Xueqiang Cao, Zhenhua Xu, Rende Mu, Junbin Sun, Jieyan Yuan, Binglin Zou,