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

Xizhong Wang; Lei Guo; Hui Peng; Lei Zheng; Hongbo Guo; Shengkai Gong

doi:10.1016/j.ceramint.2015.01.107

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

Xizhong Wang
, Lei Guo
, Hui Peng
, Lei Zheng
, Hongbo Guo^*
, Shengkai Gong

^*Corresponding author for this work

School of Materials Science and Engineering

Beihang University
Tianjin University

Research output: Contribution to journal › Article › peer-review

55 Scopus citations

Abstract

La₂Ce₂O₇ (LC) has been considered as one of the promising thermal barrier coating (TBC) candidates for operating above 1250 °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 °C was investigated. After hot corrosion in Na₂SO₄+V₂O₅ salt for 4 h, a porous layer mainly composed of (La_0.75Ce_0.25)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 (Ce_0.5La_0.5)VO₄. The hot corrosion mechanisms of the LC/YSZ TBC in the two molten salts were discussed.

Original language	English
Pages (from-to)	6604-6609
Number of pages	6
Journal	Ceramics International
Volume	41
Issue number	5
DOIs	https://doi.org/10.1016/j.ceramint.2015.01.107
State	Published - 1 Jun 2015

Keywords

Electron beam physical vapor deposition (EB-PVD)
Hot-corrosion
LaCeO (LC)
Molten salts
Thermal barrier coating (TBC)

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10.1016/j.ceramint.2015.01.107

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title = "Hot-corrosion behavior of a La2Ce2O7/YSZ thermal barrier coating exposed to Na2SO4+V2O5 or V2O5 salt at 900 °c",

abstract = "La2Ce2O7 (LC) has been considered as one of the promising thermal barrier coating (TBC) candidates for operating above 1250 °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 °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.",

keywords = "Electron beam physical vapor deposition (EB-PVD), Hot-corrosion, LaCeO (LC), Molten salts, Thermal barrier coating (TBC)",

author = "Xizhong Wang and Lei Guo and Hui Peng and Lei Zheng and Hongbo Guo and Shengkai Gong",

year = "2015",

month = jun,

day = "1",

doi = "10.1016/j.ceramint.2015.01.107",

language = "英语",

volume = "41",

pages = "6604--6609",

journal = "Ceramics International",

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T1 - Hot-corrosion behavior of a La2Ce2O7/YSZ thermal barrier coating exposed to Na2SO4+V2O5 or V2O5 salt at 900 °c

AU - Wang, Xizhong

AU - Guo, Lei

AU - Peng, Hui

AU - Zheng, Lei

AU - Guo, Hongbo

AU - Gong, Shengkai

PY - 2015/6/1

Y1 - 2015/6/1

N2 - La2Ce2O7 (LC) has been considered as one of the promising thermal barrier coating (TBC) candidates for operating above 1250 °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 °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.

AB - La2Ce2O7 (LC) has been considered as one of the promising thermal barrier coating (TBC) candidates for operating above 1250 °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 °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.

KW - Electron beam physical vapor deposition (EB-PVD)

KW - Hot-corrosion

KW - LaCeO (LC)

KW - Molten salts

KW - Thermal barrier coating (TBC)

UR - https://www.scopus.com/pages/publications/84925354359

U2 - 10.1016/j.ceramint.2015.01.107

DO - 10.1016/j.ceramint.2015.01.107

M3 - 文章

AN - SCOPUS:84925354359

SN - 0272-8842

VL - 41

SP - 6604

EP - 6609

JO - Ceramics International

JF - Ceramics International

IS - 5

ER -

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

Abstract

Keywords

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