Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 28, Issue 13, Pages 2625-2628Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2008.03.004
Keywords
shaping; suspensions; mechanical properties; Si3N4
Categories
Funding
- Deutsche Forschungsgemeinschaft [(DFG, TE 146/25-1)]
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Direct inkjet printing of aqueous ceramic suspensions with high solid content was carried out for generating ceramic layers as well as 3D-components. In this study, silicon nitride (LPS-Si3N4) was suspended with organic additives in an aqueous medium. Subsequently the suspension was adapted to this manufacturing technique concerning particle size and deflocculation. Thin layers and micro-scaled 3D-components, e.g. gearwheels and engineering parts, were generated and pressureless sintered. Mechanical properties (fracture toughness K-Ic, hardness) and microstructure of printed LPS-Si3N4 were evaluated. Results show that dense structures with good mechanical properties were obtained. No delamination or other flaw-like textures were observed. The high potential for direct inkjet printing to manufacture high performance silicon nitride ceramics is thus demonstrated. (c) 2008 Elsevier Ltd. All rights reserved.
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