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ISOTHERMAL OXIDATION BEHAVIOR OF A NiCoCrAlYSiB plus AlSiY GRADIENT COATING
Wang Weixin1,2; Jiang Sumeng1; Wei Guangzhi2; Ma Jun1; Gong Jun1; Sun Chao1
Corresponding AuthorSun Chao(csun@imr.ac.cn)
2011-05-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume47Issue:5Pages:578-586
AbstractConventional NiCoCrAlYSiB coating and (NiCoCrAlYSiB+AlSiY) gradient coating were prepared by using arc ion plating (ATP) on the Ni base single crystal superalloy substrate. Comparative studies of the morphology and microstructure together with high temperature oxidation behaviors at 1000, 1100 and 1150 C for the two different coatings were investigated. The results show that after vacuum annealing, the conventional coating is mainly composed of general gamma'/gamma and a small quantity of beta-NiAl dispersed in gamma'/gamma while the outer layer of the gradient coating consists of beta-NiAl and dispersed alpha-Cr and Cr3Si in beta-NiAl and the inner layer consists of Cr-rich phases plus minor beta-NiAl. The conventional coating has excellent oxidation resistance only at 1000 degrees C, while it degraded rapidly at 1100 degrees C and 1150 degrees C, on which surface spinel formation was observed; however, the gradient coating has more excellent oxidation resistance than the conventional one at all the three temperatures. After oxidation for 300 h at 1100 degrees C, there still exists a great amount of beta-NiAl, and even after oxidation for 300 h at 1150 degrees C, Al content is higher than 8% (mass fraction), in which a small amount of beta-NiAl and supersaturated gamma'/gamma insure the formation and self repair of alumina.
Keywordgradient coating arc ion plating isothermal oxidation interdiffusion
DOI10.3724/SP.J.1037.2010.00649
Indexed BySCI
Language英语
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000291845800011
PublisherSCIENCE PRESS
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/107000
Collection中国科学院金属研究所
Corresponding AuthorSun Chao
Affiliation1.Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China
2.Guizhou Univ, Mat & Met Coll, Guiyang 550003, Peoples R China
Recommended Citation
GB/T 7714
Wang Weixin,Jiang Sumeng,Wei Guangzhi,et al. ISOTHERMAL OXIDATION BEHAVIOR OF A NiCoCrAlYSiB plus AlSiY GRADIENT COATING[J]. ACTA METALLURGICA SINICA,2011,47(5):578-586.
APA Wang Weixin,Jiang Sumeng,Wei Guangzhi,Ma Jun,Gong Jun,&Sun Chao.(2011).ISOTHERMAL OXIDATION BEHAVIOR OF A NiCoCrAlYSiB plus AlSiY GRADIENT COATING.ACTA METALLURGICA SINICA,47(5),578-586.
MLA Wang Weixin,et al."ISOTHERMAL OXIDATION BEHAVIOR OF A NiCoCrAlYSiB plus AlSiY GRADIENT COATING".ACTA METALLURGICA SINICA 47.5(2011):578-586.
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