Speaker
Description
Sinter-based additive processes, such as lithography-based metal manufacturing (LMM) and fused filament fabrication (FFF), enable properties and design possibilities that cannot be manufactured any other way. The final geometrical precision of LMM is strongly affected by the viscosity of the used feedstock. In the printing process, the feedstock viscosity is directly connected to the roller behaviour and effect the quality of printing. Additionally, light penetration depth for photopolymerization limits the layer thickness. The viscosity of the feedstock at elevated temperatures in the decaking and cleaning step decides whether channels can be cleaned or not. All those requirements extend the development of feedstocks enormously and leads to a time- and material-consuming feedstock development process. On the other hand, FFF is especially limited by the nozzle size. The post processing of both techniques includes debinding and sintering to achieve final part characteristics and to control the microstructure. Complete removal of the binder system, good green strength, handling after debinding and a low shrinkage pushes to high loadings. Realizing low carbon contents and avoiding very long heat treatments is challenging. Here solvent debinding allows to speed up the thermal debinding by removing the dissolvable binder components beforehand.
In this work, a comparison of both techniques especially for the post treatment in debinding and sintering is evaluated.
| Speaker Country | Austria |
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| Would you like to publish your paper in the special issue of BHM "Berg- und Hüttenmännische Monatshefte" | Yes |