About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Advanced Coatings for Wear and Corrosion Protection
|
| Presentation Title |
Hot Corrosion Behavior of Yb2O3–Gd2O3–Y2O3 Co-Stabilized Zirconia in Thermal Barrier Coatings with a Lewis Neutral Layer |
| Author(s) |
Junseong Kim, Dowon Song, Guanlin Lyu, Janghyeok Pyeon, SeungCheol Yang, Yeon-Gil Jung |
| On-Site Speaker (Planned) |
Junseong Kim |
| Abstract Scope |
Yb2O3–Gd2O3–Y2O3 co-stabilized ZrO2 (YGYZ) coating with a Lewis neutral B–SiO2 layer applied on the surface by a sol–gel-based glassification process was proposed. In this study, corrosion salts (Na2SO4 + V2O5) were deposited on the YGYZ coating with the B–SiO2 layer to evaluate the hot corrosion behavior for various exposure times (20, 40, 80, 160, and 320 h) at 1100 °C. Microstructural analysis on the corroded coatings using SEM, EDS, and XRD shows that the B-SiO2 layer prevented further infiltration of corrosion salts, resulting in the suppression of phase degradation. Moreover, the stronger basicity stabilizers in the YGYZ coating could sacrifice themselves to mitigate the invasion of corrosive salts. The thermal durability of the YGYZ coatings with the B–SiO2 layer was twice that of 7-8 wt.% yttria-stabilized zirconia with the B–SiO2 layer. |