Freeze-Form Extrusion Fabrication of Functionally Graded Materials
Presented in this paper is a novel additive manufacturing technology for making three-dimensional parts with functionally graded materials (FGMs), called Freeze-form Extrusion Fabrication (FEF). The system development included a triple-extruder mechanism, extruder modeling and control, pastes extrusion planning for desired composition gradients, and software coding for motion and extrusion control. The effectiveness of the developed FEF system was demonstrated first by fabricating limestone (CaCO3) parts with graded colors and then by fabricating 'green' parts with graded compositions between alumina (Al2O3) and zirconia (ZrO2). The fabricated part went through post-processing, and the sintered part was analyzed using energy dispersive spectroscopy (EDS) to determine its material compositions.
M. Leu et al., "Freeze-Form Extrusion Fabrication of Functionally Graded Materials," CIRP Annals - Manufacturing Technology, vol. 61, no. 1, pp. 223-226, Elsevier, Jan 2012.
The definitive version is available at http://dx.doi.org/10.1016/j.cirp.2012.03.050
Mechanical and Aerospace Engineering
Materials Science and Engineering
Keywords and Phrases
Additive Manufacturing; Extrusion; Functionally Graded Materials
Article - Journal
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