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Thermal Stability of YSZ Thick Thermal Barrier Coatings Deposited by Suspension and Atmospheric Plasma Spraying
Tao, SQ; Yang, JS; Zhai, ML; Shao, F; Zhong, XH; Zhao, HY; Zhuang, Y; Ni, JX; Li, W; Tao, SY
2020-11-01
Source PublicationCRYSTALS
ISSN2073-4352
Issue11
SubtypeArticle
AbstractTwo types of segmentation-crack structured yttria-stabilized zirconia (YSZ) thick thermal barrier coatings (>500 mu m, TTBCs) were deposited onto the stainless steel substrates using atmospheric plasma spraying (APS) and suspension plasma spraying (SPS) process, respectively. In this work, thermal aging behaviors, such as the microstructures, phase compositions, grain growth, and mechanical properties of APS TTBCs and SPS TTBCs, were systematically investigated. Results showed that both as-sprayed TTBCs exhibited a typical segmentation-crack structure in the through-thickness direction. APS coatings mainly comprised of larger columnar crystals, while a large number of smaller equiaxed grains existed in SPS coatings. Both of the coatings underwent tetragonal-monoclinic phase transformation after 155 degrees C/40 h heat treatment. The poorer phase stability of SPS TTBCs may have a connection with smaller grain size. Thermal-aged APS and SPS coatings exhibited a significant increase in H and E values with the rising of thermal aging temperature, and for the samples that thermal aged at 1550 degrees C, the H and E values increased sharply during initial stage then decreased after 80 h due to the phase decomposition. The segmented APS coatings had weak bonding between the lamellaes during thermal exposure, which caused the mean Vickers hardness value of APS TTBCs to be much lower than that of SPS TTBCs.
DOI10.3390/cryst10110984
WOS KeywordHEAT-TREATMENT ; ZIRCONIA ; BEHAVIOR
Language英语
WOS Research AreaCrystallography ; Materials Science
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27644
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Tao, SQ,Yang, JS,Zhai, ML,et al. Thermal Stability of YSZ Thick Thermal Barrier Coatings Deposited by Suspension and Atmospheric Plasma Spraying[J]. CRYSTALS,2020(11).
APA Tao, SQ.,Yang, JS.,Zhai, ML.,Shao, F.,Zhong, XH.,...&Tao, SY.(2020).Thermal Stability of YSZ Thick Thermal Barrier Coatings Deposited by Suspension and Atmospheric Plasma Spraying.CRYSTALS(11).
MLA Tao, SQ,et al."Thermal Stability of YSZ Thick Thermal Barrier Coatings Deposited by Suspension and Atmospheric Plasma Spraying".CRYSTALS .11(2020).
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