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Accelerated phase transformation of thermally grown alumina on Ni2Al3: Effect of dispersion of hcp-oxides with various content and particle size and chemistry
Khan, A.1,2; Dong, Z.2; Peng, X.3,4
Corresponding AuthorPeng, X.(xpeng@imr.ac.cn)
2020-07-25
Source PublicationSURFACE & COATINGS TECHNOLOGY
ISSN0257-8972
Volume394Pages:11
AbstractA promotion in theta-to-a phase transformation of thermally grown alumina on a nickel aluminide coating by dispersing Cr2O3 nanoparticles inside has been reported most recently. In the present work, the nickel aluminide coating has been deliberately dispersed with hexagonal closed pack (hcp)-structured alpha-Al2O3 or Cr2O3 particles which vary in size from nano range to micron range and in content from 2.4 wt% to 6.5 wt%, respectively. The oxidation in air at 900 degrees C leads to several findings: 1) either the finer the size or the higher the content of the oxide particle dispersion, the faster the theta-to-alpha phase transformation, and the lower the oxidation rate, 2) alpha-Al2O3 appears to be more effective than Cr2O3 in facilitating the theta-to-alpha phase transformation; 3) faster theta-to-alpha phase transformation helps to form more adherent thermally grown alumina. The reasons for the results are interpreted.
KeywordOxide dispersion Electrodeposition Aluminide coating Phase transformation Raman spectroscopy Oxidation
Funding OrganizationNational Natural Science Foundation of China (NSFC)
DOI10.1016/j.surfcoat.2020.125861
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China (NSFC)[51471178] ; National Natural Science Foundation of China (NSFC)[51771088]
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Coatings & Films ; Physics, Applied
WOS IDWOS:000542100500038
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/140410
Collection中国科学院金属研究所
Corresponding AuthorPeng, X.
Affiliation1.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Lab Corros & Protect, 62 Wencui Rd, Shenyang 110016, Peoples R China
3.Nanchang Hangkong Univ, Sch Mat Sci & Engn, 696 Fenghenan Ave, Nanchang 330063, Jiangxi, Peoples R China
4.Nanchang Hangkong Univ, Jiangxi Prov Engn Res Ctr Surface Technol Aeronau, 696 Fenghenan Ave, Nanchang 330063, Jiangxi, Peoples R China
Recommended Citation
GB/T 7714
Khan, A.,Dong, Z.,Peng, X.. Accelerated phase transformation of thermally grown alumina on Ni2Al3: Effect of dispersion of hcp-oxides with various content and particle size and chemistry[J]. SURFACE & COATINGS TECHNOLOGY,2020,394:11.
APA Khan, A.,Dong, Z.,&Peng, X..(2020).Accelerated phase transformation of thermally grown alumina on Ni2Al3: Effect of dispersion of hcp-oxides with various content and particle size and chemistry.SURFACE & COATINGS TECHNOLOGY,394,11.
MLA Khan, A.,et al."Accelerated phase transformation of thermally grown alumina on Ni2Al3: Effect of dispersion of hcp-oxides with various content and particle size and chemistry".SURFACE & COATINGS TECHNOLOGY 394(2020):11.
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