Cardon, Ludwig

Mys, Nicolas

Verberckmoes, An

Ghent University Academic Bibliography

POLYFORCE – Polymers with and without reinforcements for part manufacturing through selective laser sintering  N. Mys1, A. Verberckmoes2, L. Cardon1 1 PMT Research Group, Faculty of Engineering and Architecture, Ghent University, Belgium 2 INCAT, Faculty of Engineering and Architecture, Ghent University, Belgium Introduction Selective Laser Sintering (SLS) is an additive manufacturing process that forms 3D objects by selectively fusing together successive layers of  powdered material. The advantage of  such processes is the ability to form parts with significantly greater geometrical complexity than can be done in more traditional processes. Although SLS is mostly known as a rapid prototyping technique it recently expanded its field to the production of  actual end-of-use parts. A stumbling block in the progression of  this technology is the limited range of  materials that can be processed. With the current move towards the end-use products the mechanical properties of  the produced parts become increasingly important and other materials need to be developed to broaden the application window. This research focuses on finding a general method to process possible polymers into a suitable form for SLS printing using both mechanical and physico-chemical approaches. It is our goal to produce in this way small spherical particles of  about 50-90 µm with a good density. Within the scope of  processing techniques extra attention will be given to spray drying and solution precipitation techniques next to conventional ball milling  as they are most likely to yield the desired particles.  This research is funded by SIM within the STREAM vertical program under the SBO PolyForce project.  Processing methods SPRAY DRYING SOLUTION-PRECIPITATION Nicolas.Mys@ugent.be www.cpmt.eu   Particle collection SEM analysis Optical microscopy Stabilization Spherical particles Agglomeration Diameter  < 10 µm Spherical particles Agglomeration to  spherical clusters Cluster size < 50 µm Optimization Outlook The main focus in this research lies on the optimization of  the current existing processes to form the desired particles. Particles of desired morphology are already feasible yet size optimization is still ongoing. A theoretical correlation will be made between the mechanical and thermal properties and the used technique.     Flawed morphology Diameter  < 10 µm Spherical morphology Diameter  < 10 µm … PLANETARY  BALL MILL Revolution speed of  disk Rotational speed of  pot Optical microscopy Optimal size achievable Undesirable morphology 

POLYFORCE : polymers with and without reinforcements for part manufacturing through selective laser sintering

https://biblio.ugent.be/publication/8538823/file/8618821.pdf

POLYFORCE : polymers with and without reinforcements for part manufacturing through selective laser sintering

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