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Isothermal oxidation behavior and microstructure change of a gradient low-expansion coating for superalloys
Ren, Pan; Zhu, Shenglong; Wang, Fuhui
2019-02-01
Source PublicationCORROSION SCIENCE
ISSN0010-938X
Volume147Pages:182-191
AbstractAn AlN gradient-doped Ni + CrAlYSiHfN coating was prepared on superalloys by magnetron sputtering. The as-deposited coating comprised of three sub-layers. AlN phase shows a gradient distribution in coating after annealing, and AlN reaches 33 vol.% at the top of the coating. Compared with NiCrAlY coating, the gradient coating reduced the CTEs mismatch between coating and alpha-Al2O3 by 41%, and it exhibited a much lower oxidation rate in oxidation test. A thin Cr23C6 diffusion barrier formed at the coating-substrate interface. In summary, the gradient coating effectively reduces the damage of thermal stress on oxide scale, and suppressed the interdiffusion between coating and substrate.
KeywordOxidation Gradient coating High-temperature protection Diffusion barrier
Indexed BySCI
Language英语
WOS IDWOS:000456902100016
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81408
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Ren, Pan,Zhu, Shenglong,Wang, Fuhui. Isothermal oxidation behavior and microstructure change of a gradient low-expansion coating for superalloys[J]. CORROSION SCIENCE,2019,147:182-191.
APA Ren, Pan,Zhu, Shenglong,&Wang, Fuhui.(2019).Isothermal oxidation behavior and microstructure change of a gradient low-expansion coating for superalloys.CORROSION SCIENCE,147,182-191.
MLA Ren, Pan,et al."Isothermal oxidation behavior and microstructure change of a gradient low-expansion coating for superalloys".CORROSION SCIENCE 147(2019):182-191.
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