Comparison of CMAS corrosion and sintering induced microstructural characteristics of APS thermal barrier coatings

被引：53

作者：

Wu, Yiyou ^{[1
,2
]}

Luo, Hua ^{[1
,2
]}

Cai, Canying ^{[1
,2
]}

Wang, Yanguo ^{[1
,2
]}

Zhou, Yichun ^{[1
,2
]}

Yang, Li ^{[1
,2
]}

Zhou, Guangwen ^{[3
,4
]}

机构：

[1] Xiangtan Univ, Sch Mat Sci & Engn, Xiangtan 411105, Peoples R China

[2] Xiangtan Univ, Key Lab Low Dimens Mat & Applicat Technol, Minist Educ, Xiangtan 411105, Peoples R China

[3] SUNY Binghamton, Dept Mech Engn, Binghamton, NY 13902 USA

[4] SUNY Binghamton, Mat Sci & Engn Program, Binghamton, NY 13902 USA

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2019年 / 35卷 / 03期

基金：

中国国家自然科学基金;

关键词：

YSZ thermal barrier coating; APS; CMAS corrosion; Anorthite; TEMPERATURE; DEGRADATION; MECHANISMS; SPALLATION; DEPOSITS; FAILURE; ATTACK;

D O I：

10.1016/j.jmst.2018.09.046

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructural features of high-temperature sintered and CaO-MgO-Al2O3-SiO2 (CMAS) corroded air plasma sprayed Y2O3 stabilized ZrO2 (YSZ) thermal barrier coatings (TBCs) under the thermal gradient condition were comparatively studied. As-sprayed YSZ has a lamellar structure and the lamellae are composed of closely aligned columnar crystals. The sintered and the CMAS corroded YSZ coatings maintain the t'-ZrO2 phase as the as-sprayed YSZ coating. The sintered YSZ remains the lamellar structure with reduced interlamellar gaps and grains coarsening. After the CMAS corrosion, the top layer of the YSZ coating keeps its lamellar structure consisting of some columnar grains with the CMAS infiltration into the intergrain gaps and the formation of striped Zr2Y2O7. The typical lamellar structure transforms into more equiaxed grains in the middle and bottom layers of the ceramic coating along with significant infiltration of amorphous CMAS and anorthite formation in the bottom layer owing to the high contents of Ca and Al. (C) 2018 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

引用

页码：440 / 447

页数：8

共 25 条

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