TY - GEN A1 - Günster, Jens T1 - Selective laser sintering in combination with layerwise slurry deposition for the additive manufacture of sic ceramics N2 - Selective laser sintering is a well-established technology for the additive manufacture of metallic and polymeric parts. For the additive manufacture of ceramic parts some examples for its successful application do exist, also. In this context, the selective laser sintering of SiC ceramic powders has been studied extensively in the past. Despite its low sintering activity, SiC is particularly suited for the selective laser sintering process, because of the possibility to form SiO2 at elevated temperatures in oxidizing ambient. The SiO2 formed can act as a binder within the laser sintering process. In the present work densely packed powder beds generated by the Layerwise Slurry Deposition (LSD) technology are selectively sintered by a cw. fiber laser. The layerwise slurry deposition is an innovative process for the deposition of layers in additive manufacturing. A slurry with no or very small organic content is repetitively spread as thin layers on each other by means of a doctor blade. During the deposition process, the ceramic particles settle to form thin layers of about 100 µm which have a high packing density (typical 55-60%). This high powder packing density is the result of a slip casting process: When a layer is deposited on a previously dried porous layer, the water is drawn into the pores by capillary forces. The LSD process therefore shares aspects of tape casting and slip casting. An additional benefit of the LSD technology is the free choice of the size of the ceramic particles used. Compared to the processing of dry flowable powders, especially small particles can be very well processed. T2 - 40th International Conference and Expo on Advanced Ceramics and Composites CY - Daytona Beach, FL, USA DA - 24.01.2016 KW - additive manufacturing PY - 2016 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/38046 AN - OPUS4-38046 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany