1998 / Solid Freeform Fabrication Proceedings
PREV and NEXT link to numerically adjacent references for this YEAR.
CONTENTS links to the title list for this YEAR's references.
Author G. M. Lous, I. A. Cornejo, T. F. McNulty, A. Safari, S. C. Danforth, Rutgers, The State University of New Jersey
Source Solid Freeform Fabrication Proceedings, 1998, pp 713-720
Abstract Fused Deposition of Ceramics (FDC), developed at Rutgers University, is a Solid Freeform Fabrication (SFF) technique where a three-dimensional green ceramic object is built layer by layer, starting from a Computer Aided Design (CAD) file of the object. This technique was used to build novel piezoelectric ultrasonic transducers for medical imaging applications. Curved ceramic skeletons for 2-2 (parallel ceramic / epoxy plates) composite transducers were built by FDC. The design's curvature can be tailored in the CAD file. Therefore, the final composite requires very little machining. In the FDC-built green parts, the ceramic plates were 500 um thick and the spacing between the plates was 1270 um. The FDC green samples were subjected to a slow binder burnout cycle at 550 deg C for 4 hours, using a heating rate of 8 deg C per hour, then sintered at 1285 deg C for 1 hour. Physical characterization of the samples revealed that 95% of the theoretical density was achieved. The ceramic plates shrunk 20% in height as well as in width. The shrinkage was of only 16% in the direction parallel to the plates. Optical microscopy and SEM were performed on green and sintered samples. The results of these characterizations are reported in this paper as well as the electromechanical properties of the final composites and of FDC bulk samples. (Auth abstract) [References: 9]
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