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

doi:10.1007/s00170-015-7720-z

CORC > 兰州理工大学 > 兰州理工大学 > 国际教育学院

	Research on rheological properties and extrusion behavior of aqueous alumina paste in paste-extrusion-based SFF processes
	Liu, Hongjun; Li, Yamin; Li, Dongjian
刊名	International Journal of Advanced Manufacturing Technology
	2016-04-01
卷号	83 期号:9-12 页码:2039-2047
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
ISSN号	02683768
DOI	10.1007/s00170-015-7720-z
英文摘要	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.
WOS研究方向	Automation & Control Systems ; Engineering
语种	英语
出版者	Springer London
WOS记录号	WOS:000373156000050
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150349]
专题	国际教育学院材料科学与工程学院
作者单位	State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, 287 Langongping Rd., Lanzhou; Gansu; 730050, China
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.