High-temperature degradation of the in-situ laser-glazed plasma sprayed LaMgAl11O19 thermal barrier coating exposed to Ca-Mg-Al-silicate deposits

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成果类型：

期刊论文

作者：

Sun, Yiwei;Wu, Hengkai;Zhao, Hongxu;Chen, Xiaolong*;Guo, Chaoqian;...

通讯作者：

Chen, Xiaolong

作者机构：

[Wu, Hengkai; Chen, Xiaolong; Sun, Yiwei; Li, Wei; Zhao, Hongxu] Jinan Univ, Inst Adv Wear & Corros Resistant & Funct Mat, Guangzhou 510632, Peoples R China.

[Chen, Xiaolong] Natl Univ Def Technol, Sci & Technol Adv Ceram Fibers & Composites Lab, Changsha 410073, Peoples R China.

[Guo, Chaoqian; Deng, Chunming] Guangdong Inst New Mat, Natl Engn Lab Modern Mat Surface Engn Technol, Guangzhou 510651, Peoples R China.

[Guo, Chaoqian; Deng, Chunming] Guangdong Inst New Mat, Guangdong Key Lab Modern Surface Engn Technol, Guangzhou 510651, Peoples R China.

[Sun, Junbin] Hengyang Normal Univ, Hunan Prov Univ, Key Lab Funct Metal Organ Cpds Hunan Prov, Coll Chem & Mat Sci,Key Lab Funct Organometall Ma, Hengyang 421008, Peoples R China.

通讯机构：

[Chen, Xiaolong] J

Jinan Univ, Inst Adv Wear & Corros Resistant & Funct Mat, Guangzhou 510632, Peoples R China.

语种：

英文

关键词：

Ceramic;Glass;High temperature corrosion;Oxide coatings

期刊：

Corrosion Science

ISSN：

0010-938X

年：

2020

卷：

176

页码：

108934

DOI：

10.1016/j.corsci.2020.108934

基金类别：

project of Key-Area Research and Development Programs of Guangdong Province [2019B010936001]; project of Key-Area Research and Development Programs of Guangzhou [202007020008]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [51301180, 51902092]; Guangdong Natural Science FoundationNational Natural Science Foundation of Guangdong Province [2018A030313811, 2016A030312015]; Guangzhou Science and Technology Program [201904010392]; Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities [11618406]; Guangdong Academy of Sciences Program [2018GDASCX-0402, 2020-GDASYL-20200104028]

机构署名：

本校为其他机构

院系归属：

化学与材料科学学院

摘要：

High-temperature degradation of the plasma sprayed LaMA coating before and after in-situ laser-glazing under CMAS attacks at 1350 degrees C for 1 h, 12 h and 48 h was comparatively investigated. Results indicate that a dense laser-glazed top layer was successfully created in-situ for a similar to 1 mm thick LaMA coating. It behaved as a sealing layer and reservoir of Al3+, Mg2+ and La3+. Melted CMAS penetration was accordingly effectively arrested accompanied by crystallizations of the CaAl2Si2O8 anorthite, MgAl2O4 spinel and Ca2La8(SiO4)(6)O-2 apatite. CMAS-induced degradation mainly occurred...

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High-temperature degradation of the in-situ laser-glazed plasma sprayed LaMgAl11O19 thermal barrier coating exposed to Ca-Mg-Al-silicate deposits

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