Influence of Processing Parameters on Manufacturing Al2O3 Parts by Extrusion Gelation Freeform Fabrication

Abstract:

Article Preview

Extrusion gelation freeform fabrication process is an extrusion-based freeforming technique capable of fabricating complex shaped monolithic ceramic prototypes by the sequential deposition and solidification of ceramic suspensions from a computer aided design model. In this process, ceramic parts are produced using an extrusion nozzle suitable for extruding ceramic suspensions. In this study, the processing parameters influencing on manufacturing Al2O3 parts were discussed. Air pressure on top of suspensions, rotating speed of screw, nozzle diameter and scan speed are the main factors to influence the dimensional precision of ceramic bodies. By optimizing these processing parameters, the green bodies were fabricated with high precision. The sintered samples with homogenous microstructure and ~97.6% relative density could be prepared by sintering of these green bodies at 1600oC for 2 hours.

Info:

Periodical:

Key Engineering Materials (Volumes 368-372)

Edited by:

Wei Pan and Jianghong Gong

Pages:

704-706

Citation:

Z. Y. Yu et al., "Influence of Processing Parameters on Manufacturing Al2O3 Parts by Extrusion Gelation Freeform Fabrication", Key Engineering Materials, Vols. 368-372, pp. 704-706, 2008

Online since:

February 2008

Export:

Price:

$38.00

[1] A.C. Young, O.O. Omatete, M.A. Janney, et al.: J. Am. Ceram. Soc. Vol. 74 (1991), p.521.

[2] O.O. Omatete, M.A. Janney and R.A. Strehlow: Ceram. Bull. Vol. 70 (1991), p.1641.

[3] S.L. Morissette, J. A. Lewis, J. Cesarano, et al.: J. Am. Ceram. Soc. Vol. 83 (2000), p.2409.

[4] S. Jurgen, H. C. Liu and S. W Nam: Mater. Sci. Eng. A Vol. 334(2002), p.187.

[5] Z.Y. Yu, Y. Huang, C.A. Wang, et al.: Rare Metal Mater. Eng. Vol. 32 (2003), p.167.

[6] Z.Y. Yu, X.W. Qi, Y. Huang, et al.: Key Eng. Mater. Vol. 336-338(2007), p.984.

[7] Z.Y. Yu: Ph. D. Thesis (Tsinghua University, Beijing, China, 2004). Fig. 4 Porous Al2O3 components fabricated by extrusion gelation freeform fabrication Fig. 5 SEM micrograph of the sintered sample section.

Fetching data from Crossref.
This may take some time to load.