Hot-corrosion behavior of a La2Ce2O7/YSZ thermal barrier coating exposed to Na2SO4 + V2O5 or V2O5 salt at 900 °C

被引：52
作者：
Wang, Xizhong [1 ,2 ]
Guo, Lei [3 ,4 ]
Peng, Hui [1 ,2 ]
Zheng, Lei [1 ,2 ]
Guo, Hongbo [1 ,2 ]
Gong, Shengkai [1 ,2 ]
机构：
[1] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
[2] Beihang Univ, Beijing Key Lab Adv Funct Mat & Thin Film Technol, Beijing 100191, Peoples R China
[3] Tianjin Univ, Sch Mat Sci & Engn, Tianjin, Peoples R China
[4] Tianjin Univ, Tianjin Key Lab Adv Joining Technol, Tianjin 300072, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2015年 / 41卷 / 05期
关键词：
Thermal barrier coating (TBC); La2Ce2O7 (LC); Electron beam physical vapor deposition (EB-PVD); Hot-corrosion; Molten salts; STABILIZED ZIRCONIA; PHASE-STABILITY; MECHANICAL-PROPERTIES; CERIUM OXIDE; DEGREES-C; YTTRIA; RESISTANCE; CERAMICS; GD2ZR2O7; GD2O3;
D O I：
10.1016/j.ceramint.2015.01.107
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
La2Ce2O7 (LC) has been considered as one of the promising thermal bather coating (TBC) candidates for operating above 1250 degrees C. In this work, a LC/yttria stabilized zirconia (YSZ) double ceramic layer TBC was produced by electron beam physical vapor deposition (EB-PVD). Hot-corrosion behavior of the LC/YSZ TBC exposed to Na2SO4+V2O5 or V2O5 salt at 900 degrees C was investigated. After hot corrosion in Na2SO4+V2O5 salt for 4 h, a porous layer mainly composed of (La0.75Ce0.25)VO4 and CeO2 was formed on the LC layer. In V2O5 salt, the molten salt directly reacted with La2Ce2O7 solid solution, leading to the formation of (Ce0.5La0.5)VO4. The hot corrosion mechanisms of the LC/YSZ TBC in the two molten salts were discussed. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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收藏
页码：6604 / 6609
页数：6
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