1998 / Solid Freeform Fabrication Proceedings
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Author Thomas F. McNulty, Ivan Cornejo, Farhad Mohammadi, Stephen C. Danforth, Ahmad Safari, Rutgers, The State University of New Jersey
Source Solid Freeform Fabrication Proceedings, 1998, pp 613-620
Abstract A new binder formulation has been developed for Fused Deposition of Ceramics (FDC) which consists of commercially-available polymer constituents. This formulation was used in conjunction with lead zirconate titanate (PZT) and hydroxyapatite (HAp) powders. Adsorption studies were performed to test the effectiveness of several carboxylic acids and alcohols on the dispersion of these powders in the binder system. In both cases, it was found that stearic acid was most effective as a dispersant for the ceramic powder / thermoplastic system. After a suitable dispersant was chosen, ceramic powders were compounded with the binder formulation to yield 55 vol.% ceramic-loaded materials. The resultant compound was used to make filament suitable for use in a modified Stratasys (TM) 3D-Modeler. The filament was well suited for FDC usage, and the parts made using FDC contained no detectable filainent-related defects. (Auth abstract) [References: 6]
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