Microstructure evolution and hot corrosion mechanisms of Ba2REAlO5 (RE = Yb, Er, Dy) exposed to V2O5 + Na2SO4 molten salt

Lei Guo; Chenglong Zhang; Qing He; Jianxing Yu; Zheng Yan; Fuxing Ye; Chengyi Dan; Vincent Ji

doi:10.1016/j.jeurceramsoc.2018.03.047

Microstructure evolution and hot corrosion mechanisms of Ba₂REAlO₅ (RE = Yb, Er, Dy) exposed to V₂O₅ + Na₂SO₄ molten salt

Lei Guo^*
, Chenglong Zhang
, Qing He
, Jianxing Yu
, Zheng Yan
, Fuxing Ye
, Chengyi Dan
, Vincent Ji

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

14 Citations (Scopus)

Abstract

Ba₂REAlO₅ (RE = Dy, Er, Yb) powders were synthesized by a solid state reaction method, followed by cold pressing and sintering to produce pellets for hot corrosion tests. When exposed to V₂O₅ + Na₂SO₄ molten salt at 900 °C and 1000 °C for 4 h and 20 h, REVO₄, Ba₃(VO₄) ₂ and BaAl₂O₄ formed as corrosion products due to chemical interactions between the ceramics and the molten salt, which were temperature and time independent. After the hot corrosion tests at 1000 °C, continuous, dense reaction layers with a thickness of ∼80 μm formed on the sample surfaces, which had an effective function on suppressing further penetration of the molten salt. The hot corrosion mechanisms of Ba₂REAlO₅ are proposed based on Lewis acid-base rule, phase diagrams and thermodynamics. From a thermodynamics perspective, the molten salt directly reacting with Ba₂REAlO₅ is difficult compared with Yb₂O₃, Al₂O₃ and BaO. © 2018 Elsevier Ltd

Original language	English
Pages (from-to)	3555-3563
Journal	Journal of the European Ceramic Society
Volume	38
Issue number	10
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2018.03.047
Publication status	Published - 1 Aug 2018
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Funding

This research is sponsored by the National Natural Science Foundation of China (Grant Nos. 51501127 ) and the Natural Science Foundation of Tianjin (No. 16JCQNJC02900 and 16JCYBJC18700 ).

Research Keywords

Ba2REAlO5
Hot corrosion
Thermal barrier coatings
V2O5 + Na2SO4

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10.1016/j.jeurceramsoc.2018.03.047

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@article{201e1c5456ad407c92be6f8b25889a55,

title = "Microstructure evolution and hot corrosion mechanisms of Ba2REAlO5 (RE = Yb, Er, Dy) exposed to V2O5 + Na2SO4 molten salt",

abstract = "Ba2REAlO5 (RE = Dy, Er, Yb) powders were synthesized by a solid state reaction method, followed by cold pressing and sintering to produce pellets for hot corrosion tests. When exposed to V2O5 + Na2SO4 molten salt at 900 °C and 1000 °C for 4 h and 20 h, REVO4, Ba3(VO4) 2 and BaAl2O4 formed as corrosion products due to chemical interactions between the ceramics and the molten salt, which were temperature and time independent. After the hot corrosion tests at 1000 °C, continuous, dense reaction layers with a thickness of ∼80 μm formed on the sample surfaces, which had an effective function on suppressing further penetration of the molten salt. The hot corrosion mechanisms of Ba2REAlO5 are proposed based on Lewis acid-base rule, phase diagrams and thermodynamics. From a thermodynamics perspective, the molten salt directly reacting with Ba2REAlO5 is difficult compared with Yb2O3, Al2O3 and BaO. {\textcopyright} 2018 Elsevier Ltd",

keywords = "Ba2REAlO5, Hot corrosion, Thermal barrier coatings, V2O5 + Na2SO4",

author = "Lei Guo and Chenglong Zhang and Qing He and Jianxing Yu and Zheng Yan and Fuxing Ye and Chengyi Dan and Vincent Ji",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

year = "2018",

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doi = "10.1016/j.jeurceramsoc.2018.03.047",

language = "English",

volume = "38",

pages = "3555--3563",

journal = "Journal of the European Ceramic Society",

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publisher = "Elsevier B.V.",

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Microstructure evolution and hot corrosion mechanisms of Ba₂REAlO₅ (RE = Yb, Er, Dy) exposed to V₂O₅ + Na₂SO₄ molten salt. / Guo, Lei; Zhang, Chenglong; He, Qing et al.
In: Journal of the European Ceramic Society, Vol. 38, No. 10, 01.08.2018, p. 3555-3563.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

TY - JOUR

T1 - Microstructure evolution and hot corrosion mechanisms of Ba2REAlO5 (RE = Yb, Er, Dy) exposed to V2O5 + Na2SO4 molten salt

AU - Guo, Lei

AU - Zhang, Chenglong

AU - He, Qing

AU - Yu, Jianxing

AU - Yan, Zheng

AU - Ye, Fuxing

AU - Dan, Chengyi

AU - Ji, Vincent

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2018/8/1

Y1 - 2018/8/1

N2 - Ba2REAlO5 (RE = Dy, Er, Yb) powders were synthesized by a solid state reaction method, followed by cold pressing and sintering to produce pellets for hot corrosion tests. When exposed to V2O5 + Na2SO4 molten salt at 900 °C and 1000 °C for 4 h and 20 h, REVO4, Ba3(VO4) 2 and BaAl2O4 formed as corrosion products due to chemical interactions between the ceramics and the molten salt, which were temperature and time independent. After the hot corrosion tests at 1000 °C, continuous, dense reaction layers with a thickness of ∼80 μm formed on the sample surfaces, which had an effective function on suppressing further penetration of the molten salt. The hot corrosion mechanisms of Ba2REAlO5 are proposed based on Lewis acid-base rule, phase diagrams and thermodynamics. From a thermodynamics perspective, the molten salt directly reacting with Ba2REAlO5 is difficult compared with Yb2O3, Al2O3 and BaO. © 2018 Elsevier Ltd

AB - Ba2REAlO5 (RE = Dy, Er, Yb) powders were synthesized by a solid state reaction method, followed by cold pressing and sintering to produce pellets for hot corrosion tests. When exposed to V2O5 + Na2SO4 molten salt at 900 °C and 1000 °C for 4 h and 20 h, REVO4, Ba3(VO4) 2 and BaAl2O4 formed as corrosion products due to chemical interactions between the ceramics and the molten salt, which were temperature and time independent. After the hot corrosion tests at 1000 °C, continuous, dense reaction layers with a thickness of ∼80 μm formed on the sample surfaces, which had an effective function on suppressing further penetration of the molten salt. The hot corrosion mechanisms of Ba2REAlO5 are proposed based on Lewis acid-base rule, phase diagrams and thermodynamics. From a thermodynamics perspective, the molten salt directly reacting with Ba2REAlO5 is difficult compared with Yb2O3, Al2O3 and BaO. © 2018 Elsevier Ltd

KW - Ba2REAlO5

KW - Hot corrosion

KW - Thermal barrier coatings

KW - V2O5 + Na2SO4

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U2 - 10.1016/j.jeurceramsoc.2018.03.047

DO - 10.1016/j.jeurceramsoc.2018.03.047

M3 - RGC 21 - Publication in refereed journal

SN - 0955-2219

VL - 38

SP - 3555

EP - 3563

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 10

ER -

Microstructure evolution and hot corrosion mechanisms of Ba₂REAlO₅ (RE = Yb, Er, Dy) exposed to V₂O₅ + Na₂SO₄ molten salt

Abstract

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Microstructure evolution and hot corrosion mechanisms of Ba2REAlO5 (RE = Yb, Er, Dy) exposed to V2O5 + Na2SO4 molten salt

Abstract

Bibliographical note

Funding

Research Keywords

Access Output

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Permanent Link

Other Files and Links

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Microstructure evolution and hot corrosion mechanisms of Ba₂REAlO₅ (RE = Yb, Er, Dy) exposed to V₂O₅ + Na₂SO₄ molten salt