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New opportunities in centrifugal powder compaction

: Riecker, S.; Studnitzky, T.; Andersen, O.; Kieback, B.

European Powder Metallurgy Association -EPMA-:
World PM 2016 Congress & Exhibition. USB Proceedings : The Powder Metallurgy World Congress, Hamburg, 9.-13.10.2016
Shrewsbury: EPMA, 2016
ISBN: 978-1-899072-48-4
6 S.
Powder Metallurgy World Congress & Exhibition (PM) <2016, Hamburg>
Fraunhofer IFAM, Institutsteil Pulvermetallurgie und Verbundwerkstoffe Dresden ()

Centrifugal sedimentation processes such as the high speed centrifugal compaction process (HCP) are known to produce green bodies with high packing density and very few defects resulting in high quality components. However the producible geometries as well as the freedom of possible gradient designs are limited. At Fraunhofer IFAM Dresden a new sedimentation process route was developed that uses a continuous suspension feed to overcome the limitations of a batchwise sedimentation. The process allows to produce homogenous sediments in terms of porosity as well as mean particle size over the height of the sediment. The green parts are strengthened by a binder infiltration step and can be machined in green state in order to achieve desired shapes with structure's dimensions down to 200 µm. Having a high green density of 68% and low organic content of <1 wt.% the sediments show good sintering properties and sinter without warpage or cracks.