Research on rheological properties and extrusion behavior of aqueous alumina paste in paste-extrusion-based SFF processes

doi:10.1007/s00170-015-7720-z

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	Research on rheological properties and extrusion behavior of aqueous alumina paste in paste-extrusion-based SFF processes
	Liu, Hongjun; Li, Yamin; Li, Dongjian
	2016-04-01
发表期刊	International Journal of Advanced Manufacturing Technology
ISSN	02683768
卷号	83 期号:9-12 页码:2039-2047
摘要	In this work, the rheological properties and extrusion behavior of aqueous alumina paste which can be used in paste-extrusion-based solid freeform fabrication (SFF) processes are presented. According to the analysis of dynamic viscoelastic properties, the aqueous alumina paste with solid loading of 50 vol% can be treated as a viscous–elastic–plastic body in the extrusion process. The paste shows the viscoelastic feature before yielding and viscoplastic feature after yielding. Although the paste possesses shear-thinning behavior, it can be extruded steadily due to relatively steady apparent viscosity within the range of shearing rate in the actual paste extrusion process. The ram extrusion experiments show that the variation of extrusion pressure is essentially determined by the rheological behavior of paste. The average extrusion pressure in steady extrusion stage can be estimated by Benbow–Bridgwater model. However, there exists a ram velocity threshold (0.1 mm/s in this study) below which the liquid phase migration will be significant and the extrusion pressure is hardly estimated. Due to the viscoplastic fluid feature of paste, the extrudate velocity cannot immediately reach to the expected value when paste extrusion starts and stops, and it could result in the imprecise deposition and "die drooling," which can be improved by the operation of pulling back of ram. © 2015, Springer-Verlag London.
关键词	Alumina Aluminum oxide Layered manufacturing Rheology Shear thinning Viscoelasticity Aqueous alumina Dynamic viscoelastic properties Extrusion pressure Rheological behaviors Rheological property Shear-thinning behavior Solid free-form fabrication Viscoplastic fluid
DOI	10.1007/s00170-015-7720-z
收录类别	EI ; SCIE
语种	英语
WOS研究方向	Automation & Control Systems ; Engineering
WOS类目	Automation & Control Systems ; Engineering, Manufacturing
WOS记录号	WOS:000373156000050
出版者	Springer London
EI入藏号	20153501209283
EI主题词	Extrusion
EI分类号	631.1 Fluid Flow, General ; 804.2 Inorganic Compounds ; 913.4 Manufacturing ; 931.1 Mechanics ; 931.2 Physical Properties of Gases, Liquids and Solids
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/150349
专题	国际教育学院材料科学与工程学院
通讯作者	Liu, Hongjun
作者单位	Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, 287 Langongping Rd, Lanzhou 730050, Gansu, Peoples R China
第一作者单位	省部共建有色金属先进加工与再利用国家重点实验室
通讯作者单位	省部共建有色金属先进加工与再利用国家重点实验室
第一作者的第一单位	省部共建有色金属先进加工与再利用国家重点实验室
推荐引用方式 GB/T 7714	Liu, Hongjun,Li, Yamin,Li, Dongjian. Research on rheological properties and extrusion behavior of aqueous alumina paste in paste-extrusion-based SFF processes[J]. International Journal of Advanced Manufacturing Technology,2016,83(9-12):2039-2047.
APA	Liu, Hongjun,Li, Yamin,&Li, Dongjian.(2016).Research on rheological properties and extrusion behavior of aqueous alumina paste in paste-extrusion-based SFF processes.International Journal of Advanced Manufacturing Technology,83(9-12),2039-2047.
MLA	Liu, Hongjun,et al."Research on rheological properties and extrusion behavior of aqueous alumina paste in paste-extrusion-based SFF processes".International Journal of Advanced Manufacturing Technology 83.9-12(2016):2039-2047.