Freeze-form Extrusion Fabrication (FEF) is an additive manufacturing technique that extrudes ceramic loaded aqueous pastes layer by layer below the paste freezing temperature for component fabrication. A computer controlled 3-D gantry system has been developed for the FEF process. The system includes a temperature control subsystem that allows for fabrication of components below the paste freezing temperature. The low temperature environment allows for larger component fabrication. Comparisons in terms of layer thickness, self-sustaining ability, and system response were performed between 0⁰C and -20⁰C for alumina sample fabrications. The minimum deposition angles without use of support material have been determined for 20⁰C, 10⁰C, 0⁰C, -10⁰C and -20⁰C fabrications.
X. Zhao et al., "Experimental Investigation of Effect of Environment Temperature on Freeze-Form Extrusion Fabrication," Proceedings of the 18th Annual Solid Freeform Fabrication Symposium (2007, Austin, TX), pp. 135 - 146, University of Texas at Austin, Aug 2007.
18th Annual Solid Freeform Fabrication Symposium (2007: Aug. 6-8, Austin, TX)
Mechanical and Aerospace Engineering
Materials Science and Engineering
Keywords and Phrases
3D printers; Alumina; Extrusion; Freezing; Additive Manufacturing; Deposition angle; Effect of environments; Experimental investigations; Freezing temperatures; Layer thickness; Low temperature environment; Support materials; Fabrication
Article - Conference proceedings
08 Aug 2007