Influence of Liquid Phase Migration on Intermittent Extrusion of Aqueous Al2O3 Paste

Abstract:

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Extrusion Freeform Fabrication Process (EFF) is an environmentally friendly solid freeform fabrication method that uses aqueous pastes to fabricate ceramic-based components. The Liquid Phase Migration (LPM) causes variation in liquid content and consequently problems in the paste extrusion. To get uniform ceramics parts with desired composition, the LPM should be avoided in extrusion process. This paper investigated the influence of LPM on extrusion process for aqueous alumina paste in EFF process. It shows that the liquid phase migration occurs in Freeform Extrusion Fabrication process and has a strong impact on extrusion pressure. The LPM can be characterized by the extrusion pressure-ram displacement profiles. The liquid phase migration becomes more serious in intermittent extrusion at low ram velocity.

Info:

Periodical:

Advanced Materials Research (Volumes 189-193)

Edited by:

Zhengyi Jiang, Shanqing Li, Jianmin Zeng, Xiaoping Liao and Daoguo Yang

Pages:

177-180

DOI:

10.4028/www.scientific.net/AMR.189-193.177

Citation:

H. J. Liu "Influence of Liquid Phase Migration on Intermittent Extrusion of Aqueous Al2O3 Paste", Advanced Materials Research, Vols. 189-193, pp. 177-180, 2011

Online since:

February 2011

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$35.00

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