Hot corrosion of high-entropy hafnate for thermal barrier coating material subjected to molten CMAS

Longkang Cong; Wei Li; Qiang Song; Yao Guo; Jiancheng Wang; Shengyue Gu; Shouyang Zhang

doi:10.1016/j.corsci.2022.110714

Hot corrosion of high-entropy hafnate for thermal barrier coating material subjected to molten CMAS

Longkang Cong, Wei Li, Qiang Song, Yao Guo, Jiancheng Wang, Shengyue Gu, Shouyang Zhang

School of Materials Sience and Engineering

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

24 Scopus citations

Abstract

The calcium magnesium aluminosilicate (CMAS) corrosion behavior of high entropy (La_0.2Ce_0.2Pr_0.2Sm_0.2Eu_0.2)₂Hf₂O₇ (HEF) thermal barrier coatings (TBCs) material heated at 1300 ℃ was first investigated. The results show that CMAS can quickly dissolve HEF, and then re-precipitate multicomponent apatite (Ap) solid solutions and HfO₂ stabilized by rare earth (RE). Moreover, the re-precipitation rate of the Ap phase has a positive relation with RE cation size. The gradient re-precipitation of the Ap phase avoids the initiation of cracks in the reaction layer. It reveals that HEF exhibits good resistance to CMAS corrosion, which is regarded as a novel TBCs material.

Original language	English
Article number	110714
Journal	Corrosion Science
Volume	209
DOIs	https://doi.org/10.1016/j.corsci.2022.110714
State	Published - Dec 2022

Keywords

Apatite
CMAS corrosion behavior
High-entropy hafnate
Thermal barrier coating material

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10.1016/j.corsci.2022.110714

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title = "Hot corrosion of high-entropy hafnate for thermal barrier coating material subjected to molten CMAS",

abstract = "The calcium magnesium aluminosilicate (CMAS) corrosion behavior of high entropy (La0.2Ce0.2Pr0.2Sm0.2Eu0.2)2Hf2O7 (HEF) thermal barrier coatings (TBCs) material heated at 1300 ℃ was first investigated. The results show that CMAS can quickly dissolve HEF, and then re-precipitate multicomponent apatite (Ap) solid solutions and HfO2 stabilized by rare earth (RE). Moreover, the re-precipitation rate of the Ap phase has a positive relation with RE cation size. The gradient re-precipitation of the Ap phase avoids the initiation of cracks in the reaction layer. It reveals that HEF exhibits good resistance to CMAS corrosion, which is regarded as a novel TBCs material.",

keywords = "Apatite, CMAS corrosion behavior, High-entropy hafnate, Thermal barrier coating material",

author = "Longkang Cong and Wei Li and Qiang Song and Yao Guo and Jiancheng Wang and Shengyue Gu and Shouyang Zhang",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier Ltd",

year = "2022",

month = dec,

doi = "10.1016/j.corsci.2022.110714",

language = "英语",

volume = "209",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Hot corrosion of high-entropy hafnate for thermal barrier coating material subjected to molten CMAS

AU - Cong, Longkang

AU - Li, Wei

AU - Song, Qiang

AU - Guo, Yao

AU - Wang, Jiancheng

AU - Gu, Shengyue

AU - Zhang, Shouyang

PY - 2022/12

Y1 - 2022/12

N2 - The calcium magnesium aluminosilicate (CMAS) corrosion behavior of high entropy (La0.2Ce0.2Pr0.2Sm0.2Eu0.2)2Hf2O7 (HEF) thermal barrier coatings (TBCs) material heated at 1300 ℃ was first investigated. The results show that CMAS can quickly dissolve HEF, and then re-precipitate multicomponent apatite (Ap) solid solutions and HfO2 stabilized by rare earth (RE). Moreover, the re-precipitation rate of the Ap phase has a positive relation with RE cation size. The gradient re-precipitation of the Ap phase avoids the initiation of cracks in the reaction layer. It reveals that HEF exhibits good resistance to CMAS corrosion, which is regarded as a novel TBCs material.

AB - The calcium magnesium aluminosilicate (CMAS) corrosion behavior of high entropy (La0.2Ce0.2Pr0.2Sm0.2Eu0.2)2Hf2O7 (HEF) thermal barrier coatings (TBCs) material heated at 1300 ℃ was first investigated. The results show that CMAS can quickly dissolve HEF, and then re-precipitate multicomponent apatite (Ap) solid solutions and HfO2 stabilized by rare earth (RE). Moreover, the re-precipitation rate of the Ap phase has a positive relation with RE cation size. The gradient re-precipitation of the Ap phase avoids the initiation of cracks in the reaction layer. It reveals that HEF exhibits good resistance to CMAS corrosion, which is regarded as a novel TBCs material.

KW - Apatite

KW - CMAS corrosion behavior

KW - High-entropy hafnate

KW - Thermal barrier coating material

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U2 - 10.1016/j.corsci.2022.110714

DO - 10.1016/j.corsci.2022.110714

M3 - 文章

AN - SCOPUS:85139290118

SN - 0010-938X

VL - 209

JO - Corrosion Science

JF - Corrosion Science

M1 - 110714

ER -

Hot corrosion of high-entropy hafnate for thermal barrier coating material subjected to molten CMAS

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Keywords

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