Roughness reduction and functional coating deposition on additive manufactured substrates with ultrasonic spray coating

by Wim Deferme, Hasselt University, Institute for Materials Research (IMO-IMOMEC)

Roughness of as-printed 3D parts is limiting the real breakthrough of Additive Manufacturing. Post processing technologies consist out of subtractive techniques such as grinding or sanding, or out of additive techniques such as coating.

In this presentation Ultrasonic Spray Coating as an additive post processing technologie is described to first of all reduce the roughness of Selective Laser Sintered substrates down to less than 2 micrometer and further, functional formulations consisting out of a polymer and nanoparticles is prepared to not only reduce the roughness but also add functionalities to the surface of the 3D substrate such as scratch resistance or superhydrophobicity.

It is shown that Ultrasonic Spray Coating can be the technology to tear down the wall that hinders the real breakthrough of Additive Manufacturing.


About Wim Deferme

Wim Deferme obtained an engineering degree in Applied Physics at the technical University of Eindhoven in The Netherlands in 2003. He obtained a PhD in Materials Physics at Hasselt University in 2009 on the surface termination of synthetic diamond.

In 2009, as a postdoc, he started research in the field of Printable Electronics and since February 2014 he is Professor at Hasselt University heading a group of 1 postdoc, 6 PhD students, 2 full-time researcher and several bachelor and master students in the field of “Functional Materials Engineering”.

His research activities are located in the printing and coating of functional materials. Ink formulation towards functional inks, printing techniques such as inkjet printing, screen printing and ultrasonic spray coating and several applications such as Organic Photovoltaic Devices and Light Emitting Devices, printed sensors,… are among his expertise!

Wim Deferme has authored/co-authored 60 Science Citation Index listed publications in scientific journals with an international referee system and has more than 80 presentations and proceedings on international conferences. He has an extensive national and international scientific network.

About Hasselt University – Institute for Materials Research (IMO-IMOMEC)

The Institute for Materials Research (IMO) is a research centre of Hasselt University with a vast knowledge in the field of materials science. It is the largest research institute of the university with a staff of more than 140 people.

IMO has an integrated and intensive collaboration with IMOMEC (Institute for Materials Research in MicroElectronics) , the department of IMEC (Interuniversity Micro Electronics Centre, Louvain) at the university campus in Diepenbeek.

While most of the more fundamental research is carried out at IMO, the largest part of applied research and projects in collaboration with industry are concentrated within IMOMEC.

The joint activities of IMO-IMOMEC concentrate on functional materials for energy and health applications with a focus on wide band gap materials, organic synthesis, organic materials for electronic applications, precursors for nanomaterials, biosensors, nanophysics and electrical, physical and chemical characterisation.