Wetting kinetics and corrosion of CMAS and CMAS-NaCl to plasma-sprayed YSZ and Al2O3-YSZ thermal barrier coatings

被引：2

作者：

Zhang, Yongang ^{[1
,3
]}

Dou, Mengfan ^{[1
]}

Gao, Wei ^{[1
]}

Han, Jiasen ^{[2
]}

Wu, Dongting ^{[1
]}

Zou, Yong ^{[1
]}

机构：

[1] Shandong Univ, Sch Mat & Engn, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Peoples R China

[2] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

[3] Shandong Univ, Inst Mat Joining, Sch Mat & Engn, 17923 Jingshi Rd, Jinan 250061, Peoples R China

来源：

CORROSION SCIENCE | 2024年 / 232卷

基金：

中国国家自然科学基金;

关键词：

Thermal barrier coatings; CMAS corrosion; CMAS-NaCl coupled corrosion; Wetting behavior; HIGH-TEMPERATURE ATTACK; FAILURE; RESISTANT; DEGRADATION;

D O I：

10.1016/j.corsci.2024.112048

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Transient wetting and corrosion behavior of CMAS and CMAS-NaCl on 7YSZ and Al 2 O 3 -YSZ TBCs were investigated at 1250 degrees C. NaCl addition decreased the melting point and viscosity of CMAS while improving the dynamic wettability during melt spreading. This intensified melt interactions with TBCs, facilitating CMAS infiltration and coating degradation. The Al 2 O 3 addition to coatings promoted interfacial reactions between glassy melts and TBCs, generating anorthite products. Such reactive wetting decreased spreading velocity and increased contact angles of glassy melts at early interaction stages, but the densely stacked anorthite layer mitigated CMAS and CMAS-NaCl attacks for a longer duration of 10 h.

引用

页数：10

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