Schlordt T, Keppner F, Travitzky N, Greil P (2012)
Publication Status: Published
Publication Type: Journal article, Original article
Publication year: 2012
Publisher: Goeller Verlag GmbH
Book Volume: 3
Pages Range: 81-88
Journal Issue: 2
Robocasting of aqueous colloidal α-AlO gels for manufacturing cellular ceramics with periodical lattice truss structures was investigated. Coagulation of gels loaded with 48 vol% α-Al O was induced by addingCHCOONH. The gels exhibit shear-thinning behavior, shear elastic moduli ranging from 6.7 to 390 kPa and yield-stresses from 25 to 570 Pa. Continuous filaments with a diameter of 0.5mmwere extruded with a deposition speed of up to 35 mm/s on a high-precision six-axis robotic system equipped with a single-screw micro-extruder. The lattice structures consist of alternating layers formed by a linear array of circular rods aligned parallel with a distance of 1mmand an angle of 90° between alternating layers. After being dried for 12 h, the robocast grids were sintered in air at 1650 °C for 2 hresulting in a fractional strut density > 0.95, amean filament diameter of 400 μm, a volume filling fraction of 0.49 (sealed walls) and 0.35 (meshed walls), and macro-cells in the deposition plane of quadratic shape with a mean area of 0.136mm ± 0.017mm Based on gravitation-driven viscous flow, model conditions for attaining free spanning ligaments were discussed. © 2012 Göller Verlag.
APA:
Schlordt, T., Keppner, F., Travitzky, N., & Greil, P. (2012). Robocasting of alumina lattice truss structures. Journal of Ceramic Science and Technology, 3(2), 81-88. https://dx.doi.org/10.4416/JCST2012-00003
MLA:
Schlordt, Tobias, et al. "Robocasting of alumina lattice truss structures." Journal of Ceramic Science and Technology 3.2 (2012): 81-88.
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