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Insight of Iron Whisker Sticking Mechanism from Iron Atom Diffusion and Calculation of Solid Bridge Radius
Alternative TitleMetall. Mater. Trans. B-Proc. Metall. Mater. Proc. Sci.
Gong, Xuzhong1; Zhang, Ben2,3; Wang, Zhi1; Guo, Zhancheng3
2014-12-01
Source PublicationMETALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
ISSN1073-5615
Volume45Issue:6Pages:2050-2056
AbstractThe sticking temperatures of three kinds of iron particles with different morphologies were examined at an inert atmosphere in a fluidized bed, indicating that the sticking temperature of a fresh reduction iron particle was lower than that of reagent iron particles, and that the sticking temperature of an iron particle with a whisker was lower than that of an iron particle without a whisker. Cavity defects on the surface of an iron particle with different morphologies were examined by positron annihilation spectroscopy. The results indicated that cavity defects on the surface of an iron particle with an iron whisker were higher than with others, which resulted in an easier surface diffusion of Fe atoms. From the calculation of a critical solid bridge radius, the critical solid bridge radius lowered with the decreasing of gas velocity and particle size. And when an instantaneous solid bridge radius was bigger than a critical solid bridge radius, sticking of the iron particle happened. The iron whisker made the surface diffusion rate of Fe atoms occur more quickly, which resulted in a faster growth rate of the instantaneous solid bridge radius. Therefore, the iron whisker supported the sticking.; The sticking temperatures of three kinds of iron particles with different morphologies were examined at an inert atmosphere in a fluidized bed, indicating that the sticking temperature of a fresh reduction iron particle was lower than that of reagent iron particles, and that the sticking temperature of an iron particle with a whisker was lower than that of an iron particle without a whisker. Cavity defects on the surface of an iron particle with different morphologies were examined by positron annihilation spectroscopy. The results indicated that cavity defects on the surface of an iron particle with an iron whisker were higher than with others, which resulted in an easier surface diffusion of Fe atoms. From the calculation of a critical solid bridge radius, the critical solid bridge radius lowered with the decreasing of gas velocity and particle size. And when an instantaneous solid bridge radius was bigger than a critical solid bridge radius, sticking of the iron particle happened. The iron whisker made the surface diffusion rate of Fe atoms occur more quickly, which resulted in a faster growth rate of the instantaneous solid bridge radius. Therefore, the iron whisker supported the sticking.
KeywordFluidized-bed Reduction Sulfur Pressure Ores Particles Temperature
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1007/s11663-014-0125-9
URL查看原文
Indexed BySCI
Language英语
WOS KeywordFLUIDIZED-BED REDUCTION ; SULFUR PRESSURE ; ORES ; PARTICLES ; TEMPERATURE
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000345089900013
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/11734
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100083, Peoples R China
3.Univ Sci & Technol Beijing, State Key Lab Adv Met, Beijing 100083, Peoples R China
Recommended Citation
GB/T 7714
Gong, Xuzhong,Zhang, Ben,Wang, Zhi,et al. Insight of Iron Whisker Sticking Mechanism from Iron Atom Diffusion and Calculation of Solid Bridge Radius[J]. METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE,2014,45(6):2050-2056.
APA Gong, Xuzhong,Zhang, Ben,Wang, Zhi,&Guo, Zhancheng.(2014).Insight of Iron Whisker Sticking Mechanism from Iron Atom Diffusion and Calculation of Solid Bridge Radius.METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE,45(6),2050-2056.
MLA Gong, Xuzhong,et al."Insight of Iron Whisker Sticking Mechanism from Iron Atom Diffusion and Calculation of Solid Bridge Radius".METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE 45.6(2014):2050-2056.
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