1993 International Solid Freeform Fabrication Symposium
Recent Submissions
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Selective Laser Sintering of Bioceramic Materials for Implants
(1993)Selective Laser Sintering (SLS) process is employed for fabrication of biocerarnics for orthopedic implants. Hydroxyapatite and Calcium Phosphate ceramics are coated with polymer as a intermediate binder by using a spray ... -
Measurement of the Thermal Conductivity of Powders by Two Different Methods
(1993)The thermal diffusivities and thermal conductivities of powders, especially PMMA-coated silicon carbide, at various temperatures, have been tested by two different dynamic methods, the water-bath method and the laser-heated ... -
Laser Sintering Model for Composite Materials
(1993)A computer model for the sintering of ceramic/polymer composite materials has been established based on empirical sintering rate data. The model calculates sintering depths which result from variations in the operating ... -
Selective Laser Sintering of A1203-
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Synthesis, Selective Laser Sintering and Infiltration of High Super Tc Dual Phase Ag-YBa2Cu307_x Superconductor Composites
(1993)Fine, homogeneous dual phase Ag-YBa2Cu307_x composite powders were prepared by a simple colloidal sol-gel co-precipitation technique. Silver did not react with or degrade YBa2Cu307_x. Bulk porous samples of pure YBa2Cu307_x ... -
Drying of Colloidal Binder Infiltrated Ceramic Green Parts Produced by Selective Laser Sintering™
(1993)Colloidal ceramic binders have been used to strengthen ceramic green shapes produced by Selective Laser Sintering. This paper focuses on the effectiveness of the colloid infiltration with respect to the physical properties ... -
Solid Freeform Fabrication of Silicon Carbide Shapes by Selective Laser Reaction Sintering (SLRS)
(1993)This paper describes an investigation ofthe production ofsilicon carbide shapes by Selective Laser Reaction Sintering (SLRS). One type ofSLRS process, which combines laser sintering of silicon with acetylene decomposition, ... -
Indirect Metal Composite Part Manufacture Using the SLS Process
(1993)As a near term alternative process to direct sintering, an intermediate polymer binder is combined with powder to produce green preforms with the Selective Laser Sintering (SLS) process. To produce parts with desirable ... -
Direct Generation of Contour Files from Constructive Solid Geometry Representations
(1993)Geometry processing for layer-based Solid Freeform Fabrication consists of at least two steps: slicing the geometry to obtain the part contours for each layer, and scan-converting the layers for laser scanning (or other ... -
Strategy for Composite Development in Rapid Prototyping
(1993)The polymeric parts built with a stereolithography apparatus (SIA) have good dimensional accuracy, but they cannot be used as functional prototypes because of their low mechanical properties. This paper describes the ... -
Potential Application of Solid Free-Form Fabrication (SFF) Process in Ceracon P/M Forging
(1993)The Ceracon Process is a patented[ll, low cost powder metallurgy process for achieving near-net-shape, full density parts. It. isasimple.·consolidation.technique which utilizes conventionalpowder metallurgyequipmenfand ... -
Thermal Analysis and Modeling of Steady-State Rod Growth During Gas-Phase Solid Freeform Fabrication
(1993)An analysis ofthe steady-state growth ofrods during gas-phase solidfreeform fabrication is presented. It is demonstrated that heat transfer controls the evolution ofshape during laser-induced pyrolysis of slender 3-D ... -
Material and Process Parameters that Affect Accuracy in Stereolithography
(1993)Experimental real time linear shrinkage rate measurements simulating stereolithography are used in an analysis of shrinkage during line drawing in stereolithography. While the amount of shrinkage depends on the polymerization ... -
The Physics of Digital Microfabrication with Molten Microdrops
(1993)Precise deposition of molten microdrops under controlled thermal conditions provides a means of 3D "digital microfabrication" , microdrop by microdrop, under complete computer control, much in the same way as 2D hard ... -
Fabrication of Ceramic and Metal Matrix Composites From Selective Laser Sintered Ceramic Preforms
(1993)This paper will discuss the tool~less fabrication of functional advanced comJX>sites by infusion of a ceramic or metal matrixinto Selective Laser Sintered(SLS) porous ceranU~preforms using Lanxide'spatentedmatrix ... -
Silicon Carbide Preforms for Metal Infiltration by Selective Laser Sintering™ of Polymer Encapsulated Powders
(1993)A polymer encapsulated silicon carbide system has been developed for use with Selective Laser Sintering. Extensive studies with this material have provided information pertaining to processing and material parameters ...
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