Investigation of microstructure changes in Al2O3-YSZ coatings and YSZ coatings and their effect on thermal cycle life

被引：53

作者：

Dai, Meiqi ^{[1
,2
]}

Song, Xuemei ^{[1
]}

Lin, Chucheng ^{[1
]}

Liu, Ziwei ^{[1
]}

Zheng, Wei ^{[1
]}

Zeng, Yi ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China

来源：

JOURNAL OF ADVANCED CERAMICS | 2022年 / 11卷 / 02期

关键词：

thermal barrier coatings (TBCs); thermal cycling; microstructure change; microscopic strain; failure mechanism; BARRIER COATINGS; SHOCK RESISTANCE; NEXT-GENERATION; FAILURE; ZIRCONIA; STRESS; TRANSITION; MECHANISM;

D O I：

10.1007/s40145-021-0538-2

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Yttria-stabilized zirconia (YSZ) coatings and Al2O3-YSZ coatings were prepared by atmospheric plasma spraying (APS). Their microstructural changes during thermal cycling were investigated via scanning electron microscopy (SEM) equipped with electron backscatter diffraction (EBSD) and X-ray diffraction (XRD). It was found that the microstructure and microstructure changes of the two coatings were different, including crystallinity, grain orientation, phase, and phase transition. These differences are closely related to the thermal cycle life of the coatings. There is a relationship between crystallinity and crack size. Changes in grain orientation are related to microscopic strain and cracks. Phase transition is the direct cause of coating failure. In this study, the relationship between the changes in the coating microstructure and the thermal cycle life is discussed in detail. The failure mechanism of the coating was comprehensively analyzed from a microscopic perspective.

引用

页码：345 / 353

页数：9

共 33 条

[1] Thermal Cycling Behavior of Thermal Barrier Coatings with MCrAIY Bond Coat Irradiated by High-Current Pulsed Electron Beam [J].