• Trussed Structures: FreeForm Fabrication without the Layers 

      Pegna, Joseph; Messia, David; Lee, Woo Ho (199)
      Recent progress in 3D-LCVD have demonstrated the advantages ofrod micro-fabrication, both from the point of view of the range of volumetric deposition rates -from 1cl- to 109 cubic micron per second- andfrom the point ...
    • Liquid Metal Jetting for Printing Metal Parts 

      Cesarano TI, Joseph; Baer, Thomas A.; Calvert, Paul (1997)
      Liquid Metal Jetting (LMJ) is solid freeform fabrication process for producing metal mechanical parts and electronic interconnects. It is a technology similar to ink jet printing where individual molten droplets are ...
    • Net shape Functional Parts Using Diode Laser 

      Manzur, Tariq; Roychoudhuri, Chandra; Dua, Puneit; Hossain, Fahmida; Marcus, Harris (1997)
      Manufacturing processes, such as cutting, drilling, soldering, marking, forming 3Dsintered parts from metal powders and laser vapor deposition, are now well established practices using matured high power lasers like ...
    • Measurement of Residual Stresses in Parts Created by Shape Deposition Manufacturing 

      Klingbeil, N.W.; Zinn, J.W.; Beuth, J.L. (1997)
      Residual stress build-up is a concern in any solid freeform fabrication process involving successive deposition of uncured or molten material, due to differential contractions caused by solidification or curing. The most ...
    • SLS Processing of Functionally Gradient Materials 

      Jepson, L.; Beaman, J. J.; Bourell, D. L.; Wood, K. L. (1997)
      A developing SLS process, known as Multiple Material Selective Laser Sintering, will allow the material composition of a component to be varied in a controlled manner. This process could allow the fabrication of functionally ...
    • Direct Selective Laser Sintering and Containerless Hot Isostatic Pressing for High Performance Metal Components 

      Das, Suman; Wohlert, Martin; Beaman, Joseph J.; Bourell, David L. (1997)
      A novel net shape manufacturing method known as SLSIHIP that combines the strengths ofselective laser sintering (SLS) and hot isostatic pressing (HIP) is presented. Direct selective laser sintering is a rapid ...
    • Layered Manufacturing Material Issues for SDM of Polymers and Ceramics 

      Kietzman, J. W.; Cooper, A. G.; Weiss, L. E.; Schultz, L.; Lombardi, J. L.; Prinz, F. B. (1997)
      Shape Deposition Manufacturing (SDM) is a solid freeform fabrication process which enables the manufacture of structural parts from engineering materials. This paper discusses the requirements and constraints for SDM ...
    • Progress on Tooling by 3D Printing; Conformal Cooling, Dimensional Control, Surface Finish and Hardness 

      Sachs, Emanuel; Allen, Samuel; Guo, Honglin; Banos, Javier; Cima, Michael; Serdy, James; Brancazio, David (1997)
      Three Dimensional Printing is being applied to the direct fabrication of tooling using metal powders. This paper presents progress updates in four areas: i) thermal management using conformal cooling and related work on ...
    • Direct SLS of powder compositions used for self-propagating high-temPerature synthesis. 

      Shishkovsky, IV.; Makarenko, A.G.; Petrov, A.L (1997)
      The conditions of a direct selective laser sintering (SLS) were resea;rched experimental in a volume and by layers for the eutectic and near-eutectic powder compositions, which usually used for the self-propagating ...
    • Statistical Process Control For Solid Freeform Fabricatin Processes 

      Gervasi, Vito R. (1997)
      Statistical prpcess control (SPC) has not been widely used for solid freeform fabrication (SFF) pr~cesses, primarily due to the wide diversity ofgeometries in builds. In addition, typical parts created on SFF platforms are ...
    • Low-cost Machine Vision Monitoring of the SLS Process 

      Gibson, Ian; Ming, Ling Wai (1997)
      During the building of a part using SLS, it is common practice to adjust the temperature parameters. It is important to control these parameters because ifthey are too high then part breakout is difficult. Ifthey are too ...
    • Laser Aided Direct Rapid Prototyping 

      Franceschini, Robert; Napravnik, Lee; Mukherjee, Amar; Sankaranarayanan, Srikanth; Kar, Aravinda (1997)
      We describe a multilevel design hierarchy applicable to the VLSI-like layered manufacturing technology of Solid Freeform Fabrication (SFF) called Laser Aided Direct Rapid Prototyping (LADRP). We discuss the interfaces between ...
    • Recent Developments in Freeform Fabrication of Dense Ceramics From Slurry Deposition 

      Cesarano TIl, Joseph; Baer, Thomas A.; Calvert, Paul (1997)
      A freeform fabrication technique for dense ceramics and composites has been developed. The technique requires less than 2 volume percent of organic additives and relies on the principle of layerwise deposition of highly ...
    • Direct-Write Fabrication of Integrated, Multilayer Ceramic Components 

      Dimos, D.; Yang, P.; Garino, TJ.; Raymond, M.V.; Rodriguez, M.A. (1997)
      The need for advanced (electronic) ceramic components with smaller size, greater functionality, and enhanced reliability requires the ability to integrate electronic ceramics in complex 3-D architectures. For rapid ...
    • A Layered-Manufacturing Process For the Fabrication of Glass-Fiber-Reinforced Composites 

      Zak, G.; Sela, M.N.; Park, C.B.; Benhabib, B. (1997)
      In this paper, we present a rapid manufacturing process for the layered fabrication of polymer-based composite parts using short discontinuous fibers as reinforcements. In the recent past, numerous research efforts, ...
    • Extrusion Freeform Fabrication of Bone-Like Mineralized Hydrogels and Muscle-like Actuators 

      Zengshe, Liu Paul, Calvert (1997)
      Extrusion freeform fabrication has been used to build shapes from agarose, polyacrylamide and polyacrylic acid hydrogels. Contraction and bending can be induced by pH change or application ofa voltage between embedded ...
    • Bonding Methods for Laminated Tooling 

      Walczyk, Daniel F.; Dolar, Nathanael Y. (1997)
      Laminated tooling consists of an array of stacked laminations that are mechanically clamped or bonded together, depending on the requirements of the manufacturing process. Various manufacturing processes that can benefit ...
    • Shrinkage and Deformation in Components Manufactured by Fused Deposition of Ceramics 

      McIntosh, Joseph J.; Danforth, Stephen C.; Jamalabad, Vikram R. (1997)
      Fused Deposition of Ceramics (FDC) presents a new processing technique that may contribute to anisotropic shrinkage and deformation, which are critical issues in the manufacture of ceramic components. The aim ofthis study ...
    • Fused Deposition of Ceramics: Progress Towards a Robust and Controlled Process for Commercialization 

      Clancy, R.; Jamalabad, V.; Whalen, P.; Bhargava, P.; Dai, C.; Rangarajan, S.; Wu, S.; Danforth, S.; Langrana, N.; Safari, A. (1997)
      The feasibility of using the Fused Deposition ofCeramics (FDC) process to rapidly fabricate functional quality advanced ceramic components has been demonstratedl - 5 . This direct manufacturing technique, by eliminating ...
    • Layered Micro-Wall Structures from the Gas Phase 

      Messia, David; Pegna, Joseph; Lee, Woo Ho (1997)
      The use of3-D LCVD with volumetric rate feedback was investigated in the fabrication ofmicromechanical wall structures. These were constructed by recursive laser scanning and resulted in layered wall composed ofrecursive ...