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Oxidation behavior of glass-based composite thermal barrier coating on K417G superalloy with a NiCoCrAlY bond coat at 1000 degrees C
Wang, Xin; Chen, Minghui; Zhu, Shenglong; Wang, Fuhui; wangx@alum.imr.ac.cn; slzhu@imr.ac.cn
2015
Source PublicationSURFACE & COATINGS TECHNOLOGY
ISSN0257-8972
Volume270Pages:314-323
AbstractA novel thermal barrier coating (TBC) of glass-based composite with inclusions of Nickel, Y-PSZ, and corundum particles was prepared by sintering on K417G superalloy with a NiCoCrAlY bond-coat (BC). Aiming at prohibiting the interfacial reactions between BC and the composite top-coat (TC), pre-oxidation process of BC was carried out to form a continuous alpha-Al2O3 scale. However, a very thin but continuous layer of gahnite formed at the alpha-Al2O3 scale/TC interface as a result of their interfacial reactions during oxidation. Thus, the original unstable alpha-Al2O3/TC interface was replaced by the inactive gahnite/TC interface. Because of the extra protection of the gahnite interlayer as well as the barrier effect of the TC on oxygen permeation, the alpha-Al2O3 scale thickened very slowly, which made the composite TBC exhibit better oxidation resistance than the NiCoCrAlY coating at 1000 degrees C. (C) 2015 Elsevier B.V. All rights reserved.
description.department[wang, xin ; chen, minghui ; zhu, shenglong ; wang, fuhui] chinese acad sci, inst met res, shenyang 110016, peoples r china
KeywordGlass-based Composite Tbc Pre-oxidation Oxidation Tgo Interfacial Reaction Gahnite Interlayer
Funding OrganizationNational High Technology Research and Development Program of China (863 Program) [2012AA03A512]; National Key Basic Research Program of China (973 Program) [2012CB625100]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/75045
Collection中国科学院金属研究所
Corresponding Authorwangx@alum.imr.ac.cn; slzhu@imr.ac.cn
Recommended Citation
GB/T 7714
Wang, Xin,Chen, Minghui,Zhu, Shenglong,et al. Oxidation behavior of glass-based composite thermal barrier coating on K417G superalloy with a NiCoCrAlY bond coat at 1000 degrees C[J]. SURFACE & COATINGS TECHNOLOGY,2015,270:314-323.
APA Wang, Xin,Chen, Minghui,Zhu, Shenglong,Wang, Fuhui,wangx@alum.imr.ac.cn,&slzhu@imr.ac.cn.(2015).Oxidation behavior of glass-based composite thermal barrier coating on K417G superalloy with a NiCoCrAlY bond coat at 1000 degrees C.SURFACE & COATINGS TECHNOLOGY,270,314-323.
MLA Wang, Xin,et al."Oxidation behavior of glass-based composite thermal barrier coating on K417G superalloy with a NiCoCrAlY bond coat at 1000 degrees C".SURFACE & COATINGS TECHNOLOGY 270(2015):314-323.
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