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Microstructure, mechanical and tribological characteristics of plasma, detonation gun and HVOF sprayed NiCr/Cr3C2-BaF2 center dot CaF2 coatings
Alternative TitleSurf. Eng.
Huang, C. B.; Du, L. Z.; Zhang, W. G.
2011-11-01
Source PublicationSURFACE ENGINEERING
ISSN0267-0844
Volume27Issue:10Pages:762-769
AbstractThe microstructure, mechanical properties and tribological behaviour of NiCr/Cr3C2-BaF2 center dot CaF2 composite coatings prepared with atmospheric plasma spraying, detonation gun spraying (DS) and high velocity oxyfuel spraying (HVOF) technologies were systematically investigated. X-ray diffraction and transmission electron microscopy analyses showed that the main phases of the three kinds of NiCr/Cr3C2-BaF2 center dot CaF2 coatings were mainly consistent with the designed feedstock powders. The three kinds of NiCr/Cr3C2-BaF2 center dot CaF2 coatings have similar and high microhardness. The HVOF and DS NiCr/Cr3C2-BaF2 center dot CaF2 coatings have lower porosity and higher adhesive strength in comparison to the plasma sprayed NiCr/Cr3C2-BaF2 center dot CaF2 coating. The friction coefficients of the HVOF and DS coatings were lower than that of the plasma sprayed coating, and the HVOF and DS coatings showed better wear resistance. The lower friction coefficients and wear rates of the three coatings and coupled Si3N4 balls at elevated temperatures were attributed to the formation of a compact BaF2 center dot CaF2 eutectic lubricating layer on the worn surface.; The microstructure, mechanical properties and tribological behaviour of NiCr/Cr3C2-BaF2 center dot CaF2 composite coatings prepared with atmospheric plasma spraying, detonation gun spraying (DS) and high velocity oxyfuel spraying (HVOF) technologies were systematically investigated. X-ray diffraction and transmission electron microscopy analyses showed that the main phases of the three kinds of NiCr/Cr3C2-BaF2 center dot CaF2 coatings were mainly consistent with the designed feedstock powders. The three kinds of NiCr/Cr3C2-BaF2 center dot CaF2 coatings have similar and high microhardness. The HVOF and DS NiCr/Cr3C2-BaF2 center dot CaF2 coatings have lower porosity and higher adhesive strength in comparison to the plasma sprayed NiCr/Cr3C2-BaF2 center dot CaF2 coating. The friction coefficients of the HVOF and DS coatings were lower than that of the plasma sprayed coating, and the HVOF and DS coatings showed better wear resistance. The lower friction coefficients and wear rates of the three coatings and coupled Si3N4 balls at elevated temperatures were attributed to the formation of a compact BaF2 center dot CaF2 eutectic lubricating layer on the worn surface.
KeywordThermal Spray Hard Coating Solid Lubrication Mechanical Properties Wear
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1179/1743294411Y.0000000007
URL查看原文
Indexed BySCI
Language英语
WOS KeywordSOLID LUBRICANT CONTENT ; COMPOSITE ; TEMPERATURE ; BEHAVIOR ; ENVIRONMENTS ; OXIDATION ; TURBINE ; POWDER ; APS
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Coatings & Films
WOS IDWOS:000298118600008
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Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/6393
Collection研究所(批量导入)
AffiliationChinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Huang, C. B.,Du, L. Z.,Zhang, W. G.. Microstructure, mechanical and tribological characteristics of plasma, detonation gun and HVOF sprayed NiCr/Cr3C2-BaF2 center dot CaF2 coatings[J]. SURFACE ENGINEERING,2011,27(10):762-769.
APA Huang, C. B.,Du, L. Z.,&Zhang, W. G..(2011).Microstructure, mechanical and tribological characteristics of plasma, detonation gun and HVOF sprayed NiCr/Cr3C2-BaF2 center dot CaF2 coatings.SURFACE ENGINEERING,27(10),762-769.
MLA Huang, C. B.,et al."Microstructure, mechanical and tribological characteristics of plasma, detonation gun and HVOF sprayed NiCr/Cr3C2-BaF2 center dot CaF2 coatings".SURFACE ENGINEERING 27.10(2011):762-769.
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