24.04.2018 14:00 Uhr
24.04.2018 17:00 Uhr
Bundesanstalt für Materialforschung und -prüfung
Haus 5, Ludwig-Erhard-Saal
Unter den Eichen 87
Bundesanstalt für Materialforschung und -prüfung, Abteilung Werkstofftechnik
Powder-based Additive Manufacturing at Micro-Gravity
Many of the most successful and precise additive manufacturing technologies are based on the deposition layer-by-layer of a flowable powder. Just to cite the most wellknown technologies, the “powder-based three-dimensional printing” and the “selective laser sintering (SLS)” or “selective laser melting (SLM)” processes all share the same layer deposition method: a flowable powder is spread layer by layer, while the layer information of the part is scribed or printed after each consecutive layer deposition step.
Besides outstanding improvements in the development of new technologies and new material systems, little progress has been made on the stabilization and densification of the deposited powder, the so called powder bed. Generally, layer deposition requires gravitational forces acting on each particle as a prerequisite for compaction of the particles and formation of a smooth layer. We have introduced an additional force acting on the particles by establishing a gas flow though the powder bed. The presentation will introduce the gas flow assisted powder deposition as a novel, easy and economic approach for the stabilization of powder beds, which allows the printing of parts without the use of support structures and at micro-gravity.
Prof. Dr. Jens Günster
Division Ceramic Processing and Biomaterials
Dr. Pedro Dolabella Portella