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

Northwestern Polytechnical University Xian
Xi'an Institute of Posts and Telecommunications

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

32 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

UR - https://www.scopus.com/pages/publications/85139290118

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

Abstract

Keywords

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