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

材料学院

科研成果: 期刊稿件 › 文章 › 同行评审

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摘要

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.

源语言	英语
文章编号	110714
期刊	Corrosion Science
卷	209
DOI	https://doi.org/10.1016/j.corsci.2022.110714
出版状态	已出版 - 12月 2022

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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

UR - http://www.scopus.com/inward/record.url?scp=85139290118&partnerID=8YFLogxK

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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