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    Browsing 1993 International Solid Freeform Fabrication Symposium by Issue Date 
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    • 1993 International Solid Freeform Fabrication Symposium
    • Browsing 1993 International Solid Freeform Fabrication Symposium by Issue Date
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    • International Solid Freeform Fabrication Symposium
    • 1993 International Solid Freeform Fabrication Symposium
    • Browsing 1993 International Solid Freeform Fabrication Symposium by Issue Date
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    Browsing 1993 International Solid Freeform Fabrication Symposium by Issue Date

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        Laser Sintering Model for Composite Materials 

        Nelson, J.C.; Vail, N.K.; Barlow, J.W. (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 ...
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        Thermal Analysis and Modeling of Steady-State Rod Growth During Gas-Phase Solid Freeform Fabrication 

        Maxwell, James L.; Pegna, Joseph (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 ...
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        Part Fabrication Using Laser Machining and Welding 

        Pridham, M.S.; Thomson, G. (1993)
        This paper describes the current work on a laser cutting and welding system for the fabrication of prototype parts in mild and .. stainless steels. The relationship to other rapid prototyping systems and to laminated ...
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        An Evaluation of the Mechanical Behavior of Bronze-NI Composites Produced by Selective Laser Sintering 

        Agarwala, Mukesh K.; Bourell, David L.; Wu, Benny; Beaman, Joseph J. (1993)
        Mechanical properties of Bronze-Nickel composites produced by Selective Laser Sintering (SLS) were evaluated by constant displacement tension tests. These were studied as a function of SLS process parameters - laser power ...
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        Measurement of the Thermal Conductivity of Powders by Two Different Methods 

        Sih, Samuel S.; Barlow, Joel W. (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 ...
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        Supersolidus Liquid Phase Selective Laser Sintering of Prealloyed Bronze Powder 

        Gopalakrishna, B.; Bourell, David L. (1993)
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        FFF at Ford Motor Company 

        O'Reilly, Sean B. (1993)
        Ford's effort in Free Fonn Fabrication (FFF) began in 1987 with the fontation of an internal consortium, Calp)sed of a dozen different activities, whose purpose was to evaluate and apply, where possible, this errerging ...
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        Picoliter Solder Droplet Dispensing 

        Marusak, Ronald E. (1993)
        A device based on ink-jet printing technology was used to produce and place molten solder droplets, approximately 25-125pm in diameter, onto substrates. The advantages of an ink-jet based system are direct production of ...
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        Synthesis, Selective Laser Sintering and Infiltration of High Super Tc Dual Phase Ag-YBa2Cu307-x Superconductor Composites 

        Agarwala, Mukesh K.; Bourell, David L.; Manthiram, Arumugam; Birmingham, Britton R.; Marcus, Harris L. (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 ...
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        Material Issues in Layered Forming 

        Amon, Christina; Beuth, Jack; Kirchner, Helmut; Merz, Robert; Prinz, Fritz; Schmaltz, Kevin; Weiss, Lee (1993)
        A brief overview of key issues in layered thermal processing is given. Incremental sintering and layered fusion ofpowder and molten droplets are discussed. The criteria for remelting the solid substrate are derivedfrom ...
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        Simulation of Solid Freeform Fabrication 

        Brown, Stuart (1993)
        Solid freeform fabrication involves highly coupled, nonlinear, thermomechanical processes. This investigation simulates the formation of a simple SFF geometry, a right, rectangular prism with aspect ratios of 1: 1:2. We ...
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        Stereolithography Epoxy Resin Development: Accuracy and Dimensional Stability 

        Pang, Thomas H. (1993)
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        Development of Nanocomposites for Solid Freeform Fabrication 

        Manthiram, A.; Chi, F.; Johnson, F.; Birmingham, B.R.; Marcus, H.L. (1993)
        Nanocomposites in which the constituents are mixed on a nanorneter scale can provide important advantages in the Selective Laser Sintering (SLS) and Selective Laser Reactive Sintering (SLRS) processes. The larger surface ...
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        Indirect Metal Composite Part Manufacture Using the SLS Process 

        Tobin, James R.; Badrinarayan, B.; Barlow, J.W.; Beaman, J.J. (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 ...
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        Selective Area Laser Deposition of Silicon Carbide 

        Tompkins, James V. (1993)
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        Powder Layer Position Accuracy in Powder-Based Rapid Prototyping 

        John Lee, Sang-Joon; Sachs, Emanuel; Cima, Michael (1993)
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        Silicon Carbide Preforms for Metal Infiltration by Selective Laser Sintering™ of Polymer Encapsulated Powders 

        Vail, N.K.; Barlow, J.W.; Marcus, H.L. (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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        Computer Aspects of Solid Freeform Fabrication: Geometry, Process Control, and Design 

        Crawford, Richard H. (1993)
        Solid Freefonn Fabrication (SFF) is a class of manufacturing technologies aimed at the production of mechanical components without part-specific tooling or process planning. Originally used for creating modelsfor ...
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        Vibratory Finishing of Stereolithography Parts 

        Spencer, John D. (1993)
        Rapid Prototype polymer resin models produced by Stereolithography have, by the nature of the process, a relatively poor surface roughness, particularly on concave and convex surfaces. In many cases this is unacceptable, ...
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        Strategy for Composite Development in Rapid Prototyping 

        Charan, B.; Bagchi, A.; Ogale, A.A.; Renault, T. (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 ...

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