Feedstock material property – process relationships in fused deposition of ceramics (FDC)

N. Venkataraman (Department of Ceramic and Materials Engineering, Rutgers University, Piscataway, New Jersey, USA.)
S. Rangarajan (Department of Ceramic and Materials Engineering, Rutgers University, Piscataway, New Jersey, USA.)
M.J. Matthewson (Department of Ceramic and Materials Engineering, Rutgers University, Piscataway, New Jersey, USA.)
B. Harper (Department of Ceramic and Materials Engineering, Rutgers University, Piscataway, New Jersey, USA.)
A. Safari (Department of Ceramic and Materials Engineering, Rutgers University, Piscataway, New Jersey, USA.)
S.C. Danforth (Department of Ceramic and Materials Engineering, Rutgers University, Piscataway, New Jersey, USA.)
G. Wu (Department of Mechanical & Aerospace Engineering, Rutgers University, Piscataway, New Jersey, USA.)
N. Langrana (Department of Mechanical & Aerospace Engineering, Rutgers University, Piscataway, New Jersey, USA.)
S. Guceri (Department of Mechanical Engineering, University of Illinois at Chicago, Illinois, USA.)
A. Yardimci (Advanced Engineering Design Center, Baxter International, Illinois, USA.)

Rapid Prototyping Journal

ISSN: 1355-2546

Publication date: 1 December 2000

Abstract

Fused deposition of ceramics (FDC) is a solid freeform fabrication technique based on extrusion of highly loaded polymer systems. The process utilizes particle loaded thermoplastic binder feedstock in the form of a filament. The filament acts as both the piston driving the extrusion and also the feedstock being deposited. Filaments can fail during FDC via buckling, when the extrusion pressure needed is higher than the critical buckling load that the filament can support. Compressive elastic modulus determines the load carrying ability of the filament and the viscosity determines the resistance to extrusion (or extrusion pressure). A methodology for characterizing the compressive mechanical properties of FDC filament feedstocks has been developed. It was found that feedstock materials with a ratio (Ea) greater than a critical value (3×105 to 5×105 s‐1) do not buckle during FDC while those with a ratio less than this range buckle.

Keywords

Citation

Venkataraman, N., Rangarajan, S., Matthewson, M., Harper, B., Safari, A., Danforth, S., Wu, G., Langrana, N., Guceri, S. and Yardimci, A. (2000), "Feedstock material property – process relationships in fused deposition of ceramics (FDC)", Rapid Prototyping Journal, Vol. 6 No. 4, pp. 244-253. https://doi.org/10.1108/13552540010373344

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MCB UP Ltd

Copyright © 2000, MCB UP Limited

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