1999 / Solid Freeform Fabrication Proceedings
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Author Rolf Pfeifer (a), Liwu Wang (b), Peter Eyerer (a), (a) Institute of Polymer Testing and Polymer Science, (b) Max-Planck Institut fur Metallforschung and INAM
Source Solid Freeform Fabrication Proceedings, 1999, pp 615-622
Abstract A novel rapid tooling technology for the fabrication of ceramic parts has been developed. A concentrated Si3N4 slurry is cast in a porous mold. Therefor, a high pressure slip casting device has been constructed which enables the use of relatively fragile polystyrene molds. Polystyrene molds have been produced using rapid prototyping techniques e.g., selective laser sintering. The required porosity is adjustable by variation of the process parameters. Mechanical and chemical methods to demold the ceramic green parts are demonstrated. The technology enables the fabrication of crackless Si3N4 parts, particularly molds with high and homogenous density and illustrates the possibility to transfer the results to other ceramics. (Auth abstract) [References: 8]
Solid Freeform Fabrication Proceedings can be obtained from: The Solid Freeform Fabrication Symposium
or contact:
The University of Texas at Austin
Laboratory for Freeform Fabrication / Texas Materials Institute
Mechanical Engineering Dept.
c/o The Solid Freeform Fabrication Symposium
MC C2200
Austin, TX 78712-1063 USA
512-471-3026; 512-471-7681 FX; Email: sffsymp@uts.cc.utexas.edu