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Gradient thermal cycling behavior of a thermal barrier coating system constituted by NiCoCrAlY bond coat and pure metastable tetragonal nano-4YSZ top coat
Yu, C. T.; Liu, H.; Zhang, J.; Ullah, A.; Bao, Z. B.; Jiang, C. Y.; Zhu, S. L.; Wang, F. H.
2019-08-15
Source PublicationCERAMICS INTERNATIONAL
ISSN0272-8842
Volume45Issue:12Pages:15281-15289
AbstractPure metastable tetragonal (t') phase 4YSZ top coats with thickness of 100 and 200 mu m were deposited on NiCoCrAlY-coated second generation single crystal superalloy by air plasma spray (APS). The two thermal barrier coatings were evaluated under gradient thermal cycling test using gas mixture of propane and oxygen. After flame shock test, the values of Young's modulus, hardness and degree of densification all exhibited a gradient distribution across YSZ thickness. In contrast to intensive sintering at surface of 200 mu m 4YSZ coating, the TBC sample with 4YSZ layer of 100 mu m underwent poor oxidation at interface of YSZ and bond coat, forming a duplex oxide scale: (Ni,Co)(Cr,Al)(2)O-4 spinet over Al2O3, which promoted the delamination at the top-coat/bond-coat interface. The resistance against gradient thermal cycling, the phase stability of 4YSZ and the failure mechanism of the TBCs, were discussed correlating to the effects of YSZ thickness.
KeywordThermal barrier coating Yttria stabilized zirconia Gradient thermal cycling Sintering Thermally grown oxide
Indexed BySCI
Language英语
WOS IDWOS:000474322000097
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80837
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Yu, C. T.,Liu, H.,Zhang, J.,et al. Gradient thermal cycling behavior of a thermal barrier coating system constituted by NiCoCrAlY bond coat and pure metastable tetragonal nano-4YSZ top coat[J]. CERAMICS INTERNATIONAL,2019,45(12):15281-15289.
APA Yu, C. T..,Liu, H..,Zhang, J..,Ullah, A..,Bao, Z. B..,...&Wang, F. H..(2019).Gradient thermal cycling behavior of a thermal barrier coating system constituted by NiCoCrAlY bond coat and pure metastable tetragonal nano-4YSZ top coat.CERAMICS INTERNATIONAL,45(12),15281-15289.
MLA Yu, C. T.,et al."Gradient thermal cycling behavior of a thermal barrier coating system constituted by NiCoCrAlY bond coat and pure metastable tetragonal nano-4YSZ top coat".CERAMICS INTERNATIONAL 45.12(2019):15281-15289.
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