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Relationship between cracks and microstructures in APS YSZ coatings at elevated temperatures
Song, Xuemei1; Meng, Fangli1; Kong, Mingguang2; Liu, Ziwei1; Huang, Liping3; Zheng, Xuebin3; Zeng, Yi1,4
2017
Source PublicationMaterials Characterization
ISSN10445803
Volume131Pages:277-284
AbstractYttria-stabilized zirconia (YSZ) thermal barrier coatings (TBCs) were prepared by plasma spraying. Thermally grown oxide (TGO) was formed between the YSZ layer and the bond coat during heat treatment of the YSZ TBCs. The generation and extension behavior of cracks before and after heat treatment were characterized by scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD) combined with 3D reconstruction technology. The characterization results give a direct evidence that the generation and extension of cracks is closely related to other microstructures such as columnar grains, TGO morphology, TGO composition, and TGO orientation. For example, large interlaminar cracks in as-sprayed YSZ coatings often appeared along with columnar grains, which can be explained by their similar formation conditions. The formation of new cracks such as vertical cracks, plane cracks and other cracks along the TGO grain boundary after heat treatment often resulted from TGO growth stresses. Therefore, the generation and extension of cracks can be controlled by regulating the formation of columnar grains and TGO. © 2017 Elsevier Inc.
DOI10.1016/j.matchar.2017.07.008
EI Accession Number20172903951670
EI KeywordsThermal barrier coatings
EI Classification Number537.1 Heat Treatment Processes - 804.2 Inorganic Compounds - 813.1 Coating Techniques - 813.2 Coating Materials - 932.3 Plasma Physics - 933.1.2 Crystal Growth - 951 Materials Science
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/25901
Collection中国科学院上海硅酸盐研究所
Affiliation1.The State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China;
2.Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei; 230031, China;
3.Key Laboratory of Inorganic Coating Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China;
4.CAS Center for Excellence in Superconducting Electronics (CENSE), Shanghai; 200050, China
Recommended Citation
GB/T 7714
Song, Xuemei,Meng, Fangli,Kong, Mingguang,et al. Relationship between cracks and microstructures in APS YSZ coatings at elevated temperatures[J]. Materials Characterization,2017,131:277-284.
APA Song, Xuemei.,Meng, Fangli.,Kong, Mingguang.,Liu, Ziwei.,Huang, Liping.,...&Zeng, Yi.(2017).Relationship between cracks and microstructures in APS YSZ coatings at elevated temperatures.Materials Characterization,131,277-284.
MLA Song, Xuemei,et al."Relationship between cracks and microstructures in APS YSZ coatings at elevated temperatures".Materials Characterization 131(2017):277-284.
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