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Segregation and microstructural evolution at interfaces of atmospheric plasma sprayed thermal barrier coatings during thermal cycling
Liu, Y. Z.1,2; Hu, X. B.2,3
Corresponding AuthorLiu, Y. Z.(yzliu10b@alum.imr.ac.cn) ; Hu, X. B.(xbhu@northwestern.edu)
2020-04-05
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume819Pages:13
AbstractSegregation and microstructural evolution at interfaces of thermal barrier coatings (TBCs) during thermal cycling were systematically investigated using scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. The as-sprayed TBCs were thermally cycled between 1100 degrees C and ambient temperature up to 3000 cycles. Results show that phosphorus, sulfur, and yttrium co-segregate at the top coat (TC)/bond coat (BC) interface after 3000 cycles. The above co-segregation at the BC/substrate interface was delayed by 1000 cycles. Chemical components of thermally grown oxide (TGO) layers at both the TC/BC and BC/substrate interfaces change from O and Al to O, Al, Cr, Co and Ni as the thermal cycling proceeded. The corresponding oxides in the TGO layers evolved from alpha-Al2O3 to alpha-Al2O3, Cr2O3, NiO and spinel phases. Controlled by the element diffusion rate and selective internal oxidation, evolution of the thickness of the TGO layers followed a natural logarithmic law. (C) 2019 Elsevier B.V. All rights reserved.
KeywordThermal barrier coatings (TBCs) Microstructural evolution Interfacial oxidation Oxidation kinetics Element segregation Scanning transmission electron microscopy (STEM)
Funding OrganizationNatural Science Foundation of Zhejiang Province ; Natural Science Foundation of Ningbo Municipality ; Joint Funds of NSFC-ZJ
DOI10.1016/j.jallcom.2019.153026
Indexed BySCI
Language英语
Funding ProjectNatural Science Foundation of Zhejiang Province[LY18E050027] ; Natural Science Foundation of Ningbo Municipality[2018A610145] ; Joint Funds of NSFC-ZJ[U1609208]
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000507378300131
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/136681
Collection中国科学院金属研究所
Corresponding AuthorLiu, Y. Z.; Hu, X. B.
Affiliation1.Ningbo Univ Technol, Sch Mech Engn, Ningbo 315336, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
3.Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA
Recommended Citation
GB/T 7714
Liu, Y. Z.,Hu, X. B.. Segregation and microstructural evolution at interfaces of atmospheric plasma sprayed thermal barrier coatings during thermal cycling[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020,819:13.
APA Liu, Y. Z.,&Hu, X. B..(2020).Segregation and microstructural evolution at interfaces of atmospheric plasma sprayed thermal barrier coatings during thermal cycling.JOURNAL OF ALLOYS AND COMPOUNDS,819,13.
MLA Liu, Y. Z.,et al."Segregation and microstructural evolution at interfaces of atmospheric plasma sprayed thermal barrier coatings during thermal cycling".JOURNAL OF ALLOYS AND COMPOUNDS 819(2020):13.
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