Hot corrosion behavior of La2(Zr0.7Ce0.3)2O7 based coatings prepared by plasma spraying and exposed to molten salts at 1050°C in air

被引：5
|
作者：
Khan, Z. S. [1 ]
Zou, B. [2 ]
Cao, X. [2 ]
机构：
[1] Natl Univ Sci & Technol, Ctr Adv Studies Energy, Islamabad 44000, Pakistan
[2] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resources Utilizat, Changchun 130022, Jilin, Peoples R China
来源：
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2016年 / 67卷 / 11期
关键词：
ceramic; coating; hot-corrosion; microstructure; molten salt; THERMAL BARRIER COATINGS; THERMOPHYSICAL PROPERTIES; RESISTANCE; EVOLUTION; CERAMICS; YTTRIA; YSZ;
D O I：
10.1002/maco.201508745
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Hot-corrosion performance of plasma sprayed La-2(Zr0.7Ce0.3)(2)O-7 based coatings in contact with Na2SO4, V2O5, and Na2SO4+V2O5 mixtures (50:50wt%) were investigated at 1050 degrees C in air for 12h. Structural change is found to rank minimal to moderate and to be severe in case of exposures to Na2SO4, V2O5, and salt mixture, respectively. The pyrochlore-structured coating on exposure to salt mixture undergoes various chemical reactions and massive phase transitions, resulting in the formation of rare earth vanadates, lanthanum sulphates, and mainly the monoclinic and tetragonal phases of zirconia. Coatings exposed for 12 and 24h to salt mixture, exhibited almost no difference.
引用
收藏
页码：1195 / 1203
页数：9
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