Hot corrosion behavior of dense CYSZ/YSZ bilayer coatings deposited by atmospheric plasma spray in Na2SO4 + V2O5 molten salts

被引：23
作者：
de la Roche, Jhonattan [1 ]
Alvarado-Orozco, Juan Manuel [2 ]
Gomez, Pablo Andres [1 ,3 ]
Cano, Irene Garcia [4 ]
Dosta, Sergi [4 ]
Toro, Alejandro [1 ]
机构：
[1] Univ Nacl Colombia, Tribol & Surfaces Grp, Calle 75 79A-51, Medellin 050034, Colombia
[2] Ctr Ingn & Desarrollo Ind CIDESI, Av Playa Pie Cuesta 702, Desarrollo San Pablo 76125, Queretaro, Mexico
[3] Empresas Publ Medellin EPM, Medellin, Colombia
[4] Univ Barcelona, CPT Thermal Spray Ctr, Dept Engn Quim Met 1, Mat Engn, Marti & Franques 1, E-08028 Barcelona, Spain
来源：
SURFACE & COATINGS TECHNOLOGY | 2022年 / 432卷
关键词：
TBCs; YSZ; CYSZ; Hot corrosion; Air plasma spray; THERMAL-BARRIER COATINGS; YTTRIA-STABILIZED ZIRCONIA; MOLTEN SULFATE; SODIUM-SULFATE; CERIA; YSZ; MICROSTRUCTURE; CEO2; SOLUBILITIES; DEGRADATION;
D O I：
10.1016/j.surfcoat.2021.128066
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this work, the hot corrosion (HC) resistance of bilayer thermal barrier coatings (TBC) architectures composed of dense Ceria-Yttria Stabilized Zirconia (CYSZ) and Yttria-Stabilized Zirconia (YSZ) deposited using the Atmospheric Plasma Spray (APS) technique was evaluated. Two kinds of HC tests were performed using different salt concentrations and thermal cycling (adding fresh salt between cycles) with a constant salt mixture (Na2SO4-V2O5) and constant testing temperature (900 ?). The results showed that the HC mechanism changes with the testing procedure, and the outer dense CYSZ layer acts as a barrier to protect the inner layers against HC degradation. However, the formation of vertical cracks during the coating deposition process affected the corrosion resistance of the TBC systems.
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页数：12
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