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Schwerpunktprogramm "Materials for Additive Manufacturing" (SPP 2122)
Deutsche Forschungsgemeinschaft (DFG)
The Priority Programme's main objective is the synthesis of new metal and polymer powders for efficient laser-based 3D additive manufacturing by means of formulations, additivations and (chemical) modifications of both, new and commercial powders. By this, the range of powder materials accessible for laser-based additive manufacturing shall be enhanced significantly. Improving the processability includes requirements like efficient, low cycling time, highly reproducible and precise laser-based additive manufacturing processes. Hence, a recursive research, where the knowledge on materials behaviour during laser-based additive manufacturing is used as input for improved materials design, and vice versa, is preferred. A deepened, preferably predictive, understanding of the material's behaviour during laser-based additive manufacturing by means of suitable analytical and theoretical examination methods is desired.

Research will be carried out on materials for laser-based 3D additive manufacturing, namely laser powder bed fusion or direct energy deposition, which show a high need for improvement. These are limited to polymer and metal micro powders and their chemical as well as metallurgical and additive-based modifications. The Priority Programme also aims at addressing scientific questions and concepts bridging the two materials classes of polymers and metals. Exemplary scientific challenges are:

o Specific adaptation of material parameters like absorption coefficients for infrared and visible lasers, crystallisation behaviour or calorimetric properties to improve the laser-based additive manufacturing process.
o Development of micro powders with improved reusability, in the context of resource efficiency of the laser-based additive manufacturing process.
o Development of scalable micro powder synthesis processes, aiming at an optimised crystallisation-melting-window or additive dispersion while providing spherical and size-controlled powders, including improved polymer chain mobility, kinetic control of melting and resolidification, or defined alloy recrystallisation.
o Significant extension of the property profiles of laser-based additive manufacturing parts by new and improved materials with e.g. adapted meltability, flowability as well as wetting behaviour.
o Improved understanding of the melting and sintering dynamics by in-situ process analytics as well as theoretical methods. In-situ process analytics shall provide information beyond imaging or temperature measurement, i.e. spectral or microstructural information linked to composition, processability, crystallisation, ageing, or reusability.
o Improved understanding of the relationship between materials structure and processability on different length scales, e.g. via modelling and simulation.

The Priority Programme aims to bring together materials scientists and photonics researchers. To this end, interdisciplinary and transregional cooperation between the two fields of "materials" and "laser-based additive manufacturing" in the form of tandem projects (joint projects with applicants from both fields) is highly desired. Projects that are not proposed as tandem projects will need to include additional scientific justification.

For scientific enquiries please contact the Priority Programme coordinator:
Professor Dr.-Ing. Stephan Barcikowski
Universität Duisburg-Essen
Technische Chemie I
Universitätsstr. 7
45141 Essen
phone +49 201 183-3150

Questions on the DFG proposal process can be directed to:
Programme contact:
Dr.-Ing. Christiane Richter
phone +49 228 885-2749

Administrative contact:
Carina Leber
phone +49 228 885-2377

Further Information: