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Oxidation and Hot Corrosion Behavior of Plasma-Sprayed MCrAlY-Cr2O3 Coatings
Zhang, Tiantian1,2; Huang, Chuanbing1; Lan, Hao1; Du, Lingzhong1; Zhang, Weigang1
2016-08-01
Source PublicationJOURNAL OF THERMAL SPRAY TECHNOLOGY
ISSN1059-9630
Volume25Issue:6Pages:1208-1216
AbstractThe oxidation and hot corrosion behavior of two atmospheric plasma-sprayed NiCoCrAlY-Cr2O3 and CoNiCrAlY-Cr2O3 coatings, which are primarily designed for wear applications at high temperature, were investigated in this study. The two coatings were exposed to air and molten salt (75%Na2SO4-25%NaCl) environment at 800 A degrees C under cyclic conditions. Oxidation and hot corrosion kinetic curves were obtained by thermogravimetric technique. X-ray diffraction analysis and scanning electron microscopy with energy-dispersive x-ray spectrometry were employed to characterize the coatings' microstructure, surface oxides, and composition. The results showed that both coatings provided the necessary oxidation resistance with oxidation rates of about 1.03 x 10(-2) and 1.36 x 10(-2) mg/cm(2) h, respectively. The excellent oxidation behavior of these two coatings is attributed to formation of protective (Ni,Co)Cr2O4 spinel on the surface, while as-deposited Cr2O3 in the coatings also acted as a barrier to diffusion of oxidative and corrosive substances. The greater presence of Co in the CoNiCrAlY-Cr2O3 coating restrained internal diffusion of sulfur and slowed down the coating's degradation. Thus, the CoNiCrAlY-Cr2O3 coating was found to be more protective than the NiCoCrAlY-Cr2O3 coating under hot corrosion condition.
KeywordHot Corrosion Mcraly-cr2o3 Coating Oxidation Plasma Spray
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1007/s11666-016-0433-5
Indexed BySCI
Language英语
WOS KeywordDEGREES-C ; ENVIRONMENT ; MICROSTRUCTURE ; SUPERALLOY ; COMPONENTS ; ALLOY ; NICR ; HVOF
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Coatings & Films
Funding OrganizationNational Natural Science Foundation of China(51471159)
WOS IDWOS:000381208200010
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21284
Collection多相复杂系统国家重点实验室
Affiliation1.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Lab Particle Sci & Engn, Inst Proc Engn, 1 Beier Tiao, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Tiantian,Huang, Chuanbing,Lan, Hao,et al. Oxidation and Hot Corrosion Behavior of Plasma-Sprayed MCrAlY-Cr2O3 Coatings[J]. JOURNAL OF THERMAL SPRAY TECHNOLOGY,2016,25(6):1208-1216.
APA Zhang, Tiantian,Huang, Chuanbing,Lan, Hao,Du, Lingzhong,&Zhang, Weigang.(2016).Oxidation and Hot Corrosion Behavior of Plasma-Sprayed MCrAlY-Cr2O3 Coatings.JOURNAL OF THERMAL SPRAY TECHNOLOGY,25(6),1208-1216.
MLA Zhang, Tiantian,et al."Oxidation and Hot Corrosion Behavior of Plasma-Sprayed MCrAlY-Cr2O3 Coatings".JOURNAL OF THERMAL SPRAY TECHNOLOGY 25.6(2016):1208-1216.
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