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Corrosion Resistance of Ti3Al/BN Abradable Seal Coating
Alternative TitleActa Metall. Sin.-Engl. Lett.
Zhang, Feng1,2; Lan, Hao1; Huang, Chuanbing1; Zhou, Yang1; Du, Lingzhong1; Zhang, Weigang1
2014-12-01
Source PublicationACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN1006-7191
Volume27Issue:6Pages:1114-1121
AbstractTi-Al mixed powder (Ti:Al = 3:1 in atomic ratio) and Ti3Al intermetallic alloy powder mechanically clad hexagonal BN to fabricate TiAl/BN and Ti3Al/BN composite powders. The corresponding porous abradable seal coatings (named as TAC-1 and TAC-2, respectively) were deposited using vacuum plasma spray (VPS) technology, and their corrosion behavior was studied via salt spray corrosion and electrochemical tests. Phase compositions and microstructures of these coatings before and after corrosion were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) facilitated with energy dispersive X-ray spectrometer (EDS). The results showed that spontaneous passivation of TAC-1 and TAC-2 granted the coatings excellent corrosion resistance than that of commercial Al/BN coating. Additionally, TAC-2 exhibited higher corrosion potential (E-corr) and breakdown potential (E-bp) but a lower corrosion current density (i(corr)) than TAC-1. A small quantity of the corrosion product (Al(OH)(3) and AlO) could be detected on the surface of TAC-1, while no corrosion product appeared in TAC-2. The non-uniform elements distribution in the metal matrix of TAC-1 resulted in localized corrosion and relatively poor corrosion resistance compared to TAC-2.; Ti-Al mixed powder (Ti:Al = 3:1 in atomic ratio) and Ti3Al intermetallic alloy powder mechanically clad hexagonal BN to fabricate TiAl/BN and Ti3Al/BN composite powders. The corresponding porous abradable seal coatings (named as TAC-1 and TAC-2, respectively) were deposited using vacuum plasma spray (VPS) technology, and their corrosion behavior was studied via salt spray corrosion and electrochemical tests. Phase compositions and microstructures of these coatings before and after corrosion were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) facilitated with energy dispersive X-ray spectrometer (EDS). The results showed that spontaneous passivation of TAC-1 and TAC-2 granted the coatings excellent corrosion resistance than that of commercial Al/BN coating. Additionally, TAC-2 exhibited higher corrosion potential (E-corr) and breakdown potential (E-bp) but a lower corrosion current density (i(corr)) than TAC-1. A small quantity of the corrosion product (Al(OH)(3) and AlO) could be detected on the surface of TAC-1, while no corrosion product appeared in TAC-2. The non-uniform elements distribution in the metal matrix of TAC-1 resulted in localized corrosion and relatively poor corrosion resistance compared to TAC-2.
KeywordCoating Galvanic Corrosion Thermal Spraying Titanium Aluminide
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1007/s40195-014-0133-4
URL查看原文
Indexed BySCI
Language英语
WOS KeywordWEAR BEHAVIOR ; OXIDE FILMS ; TITANIUM ; ALLOYS ; TEMPERATURE ; PERFORMANCE ; POWDER ; LAYERS
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000347024100019
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/11887
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Feng,Lan, Hao,Huang, Chuanbing,et al. Corrosion Resistance of Ti3Al/BN Abradable Seal Coating[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2014,27(6):1114-1121.
APA Zhang, Feng,Lan, Hao,Huang, Chuanbing,Zhou, Yang,Du, Lingzhong,&Zhang, Weigang.(2014).Corrosion Resistance of Ti3Al/BN Abradable Seal Coating.ACTA METALLURGICA SINICA-ENGLISH LETTERS,27(6),1114-1121.
MLA Zhang, Feng,et al."Corrosion Resistance of Ti3Al/BN Abradable Seal Coating".ACTA METALLURGICA SINICA-ENGLISH LETTERS 27.6(2014):1114-1121.
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