Corrosion behavior of CMAS coupling NaVO3 salt for plasma-sprayed Al2O3/YSZ thermal barrier coatings

被引：2

作者：

Zhang, Yongang ^{[1
,2
]}

Han, Jiasen ^{[1
]}

Wu, Dongting ^{[1
,2
]}

Zou, Yong ^{[1
]}

机构：

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

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

来源：

CORROSION SCIENCE | 2023年 / 221卷

基金：

中国国家自然科学基金;

关键词：

Thermal barrier coatings; CMAS corrosion; CMAS-NaVO3 coupled corrosion; Al2O3; YSZ composite coating; HIGH-TEMPERATURE ATTACK; YSZ; DEGRADATION; RESISTANT; FAILURE;

D O I：

10.1016/j.corsci.2023.111369

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cost-effective of 20 wt.% Al2O3-7YSZ TBCs were designed and achieved desirable corrosion resistance against CMAS and CMAS + NaVO3 salt (abbreviated as CN). NaVO3 additions decreased the melting point, viscosity and improved the wettability of CMAS deposits, thereby promoting globular zirconia formation and interior infiltration in the TBCs. Furthermore, compared to conventional 7YSZ TBCs, the Al2O3 addition effectively mitigated CMAS- and CN-induced corrosion by limiting the initial melt spreading and subsequent infiltration. This was because Al2O3 dissolution into the CMAS/CN melt modified its thermophysical properties, inducing crystallization and dense layering of the anorthite interfacial reaction product.

引用

页数：11

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