1995 / Solid Freeform Fabrication Proceedings
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Author R.S. Crockett (a), J. O'Kelly (a), P.D. Calvert (a), B.D. Fabes (a), K. Stuffle (b), P. Creegan (b), R. Hoffman (b), (a) University of Arizona, (b) Advanced Ceramics Research
Source Solid Freeform Fabrication Proceedings, 1995, pp 17-24
Abstract Stereodeposition techniques are well suited for the Solid Freeform Fabrication of dense ceramic components. As opposed to forming a pattern in a particle bed or polymer bath, stereodeposidori processes deposit material directly onto the previously created layer. The key to stereodeposidon is a material's ability to be dispensed as a fluid, yet rapidly stiffen to hold the shape of the object. T'his is accomplished by either solidification of a thermoplastic binder upon cooling from a melt (Fused Deposition) or by polymerization of a binder (Reactive Stereodeposition). We are developing both techniques for the production of functional ceramic and engineering polymer objects. A key issue in developing a successful stereodeposition system is controlling the rate of bead transformation from liquid to solid. Control is critical to achieving high resolution and low surface roughness of the finished product, but is made complex by the large number of parameters involved. These include binder parameters (s urface tension, gelling characteristics), sliirty, parameters (viscosity, particle loading and size distribution), and process parameters (deposition rate, temperature). Current efforts at the University of Arizona are focused on modeling and controlling the deposition and transformation of ceramic slurries used in the Reactive Stereodeposition process. (Auth abstract) [References: 7]
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