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Preparation and Enhanced Hot Corrosion Resistance of a Zr-Doped PtAl2+(Ni, Pt)Al Dual-Phase Coating
Jiang Chengyang1,2; Yang Yingfei2; Zhang Zhengyi3; Bao Zebin2; Zhu Shenglong2; Wang Fuhui1
Corresponding AuthorBao Zebin(zbbao@imr.ac.cn)
2018-04-01
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume54Issue:4Pages:581-590
AbstractPrior to practical service, hot-section components (e.g. airfoils and vanes) of a gas turbine engine are necessarily coated by a protective metallic coating (such as aluminidi diffusion coating, modified aluminide coating and MCrAlY overlay etc.) to resist high temperature oxidation and hot corrosion. Among the modified aluminide coatings, the coating with Pt-modification has attracted great attention and is widely used in applications requiring high reliability and extended service life since it possesses superior oxidation/corrosion resistance at high temperature. The presence of Pt in aluminide coating is favorable for increasing bonding strength of oxide scale, enlarging phase region of beta 3-NiAI and confining detrimental effect of sulphur etc. Although Pt-modification has exhibited visible benefits for acquiring better high-temperature performance, it is far from satisfaction to develop an ideal aluminide diffusion coating. Reactive elements such as Y, Hf, Zr or their oxides have been employed to modify the nickel aluminide coating system, with an aim to further improve scale adhesion and promote exclusive formation of alpha-Al2O3 simultaneously. In this work, a Zr-doped PtAl2+(Ni, Pt)Al dual-phase aluminide coating was prepared on a Ni-based single crystal superalloy by co-deposition of Pt-Zr through electroplating and sub-sequent aluminization treatments The coating was mainly composed of three layers: the outmost layer consisted of double phases with PtAl2 particles dispersed in beta-(Ni, Pt)Al domain, while the interlayer comprised beta-(Ni, Pt)Al with small amount of Cr-precipitates, and the bottom layer was an inter-diffusion zone (IDZ). Zirconium was mainly distributed inside beta-(Ni, Pt)Al solid solution in both the outmost layer and the interlayer. Compared with normal PtAl2+(Ni, Pt)Al dual-phase coating, the hot corrosion behavior of the Zr-doped PtAl2 + (Ni, Pt)Al coating was assessed in a salt mixture of Na2SO4/NaCI (75:25, mass ratio) at 850 degrees C in static air. The results indicated that the Zr-doped PtAl2+(Ni, Pt)Al dual-phase coating exhibited superior hot corrosion resistance since Zr was confirmed able to capture and fix S and CI to diminish their detrimental effects. Meanwhile, a pre-oxidation treatment did not effectively improve the overall hot corrosion resistance of normal PtAl2+(Ni, Pt)Al coating because the thin alumina scale formed during pre-oxidation was unable to prohibit the sustained inward-invasion of the mixed salt.
KeywordZr-doping reactive element Pt-Al coating hot corrosion
Funding OrganizationNational Natural Science Foundation of China ; Defense Industrial Technology Development Program ; Liaoning BaiQianWan Talents Program
DOI10.11900/0412.1961.2017.00376
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51671202] ; National Natural Science Foundation of China[51301184] ; Defense Industrial Technology Development Program[JCKY2016404C001] ; Liaoning BaiQianWan Talents Program
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000433006500012
PublisherSCIENCE PRESS
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/128535
Collection中国科学院金属研究所
Corresponding AuthorBao Zebin
Affiliation1.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Liaoning, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
3.China Natl South Aviat Ind Co Ltd, Zhuzhou 412002, Peoples R China
Recommended Citation
GB/T 7714
Jiang Chengyang,Yang Yingfei,Zhang Zhengyi,et al. Preparation and Enhanced Hot Corrosion Resistance of a Zr-Doped PtAl2+(Ni, Pt)Al Dual-Phase Coating[J]. ACTA METALLURGICA SINICA,2018,54(4):581-590.
APA Jiang Chengyang,Yang Yingfei,Zhang Zhengyi,Bao Zebin,Zhu Shenglong,&Wang Fuhui.(2018).Preparation and Enhanced Hot Corrosion Resistance of a Zr-Doped PtAl2+(Ni, Pt)Al Dual-Phase Coating.ACTA METALLURGICA SINICA,54(4),581-590.
MLA Jiang Chengyang,et al."Preparation and Enhanced Hot Corrosion Resistance of a Zr-Doped PtAl2+(Ni, Pt)Al Dual-Phase Coating".ACTA METALLURGICA SINICA 54.4(2018):581-590.
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