Experimental determination of scattering processes in the interaction of laser radiation with polyamide 12 powder

Schuffenhauer T, Stichel T, Schmidt M (2020)

Publication Type: Conference contribution

Publication year: 2020

Journal

Procedia CIRP Curran

Publisher: Elsevier B.V.

Book Volume: 94

Pages Range: 85-88

Conference Proceedings Title: Procedia CIRP

DOI: 10.1016/j.procir.2020.09.017

Abstract

Energy density, scanning strategy and laser spot size are some of the parameters influencing the optical energy input during laser-based powder bed fusion of polymers. For newly developed polymer powders, such parameters must still be determined empirically. Understanding the complex mechanisms underlying the beam-matter interaction, including absorption characteristics or multiple scattering behavior, is crucial to predict material processability and to improve interlayer fusion for enhanced final part properties. A measurement system based on two integrating spheres is employed to analyze the scattering processes during the interaction of a CO2 laser beam with polymeric powder materials. The setup is used to measure total reflection from the sample surface as well as unscattered and diffuse transmission through the sample. The resulting optical properties of polyamide 12 powder are evaluated and compared to those of thin films of the same base material. Thus, the influence of particle interfaces on the energy deposition characteristics can be analyzed qualitatively.

Authors with CRIS profile

Thomas Schuffenhauer Lehrstuhl für Photonische Technologien (LPT) Michael Schmidt Lehrstuhl für Photonische Technologien (LPT)

Involved external institutions

Bayerisches Laserzentrum gemeinnützige Forschungsgesellschaft mbH (BLZ) DE Germany (DE)

How to cite

APA:

Schuffenhauer, T., Stichel, T., & Schmidt, M. (2020). Experimental determination of scattering processes in the interaction of laser radiation with polyamide 12 powder. In M. Schmidt, F. Vollertsen, E. Govekar (Eds.), Procedia CIRP (pp. 85-88). Elsevier B.V..

MLA:

Schuffenhauer, Thomas, Thomas Stichel, and Michael Schmidt. "Experimental determination of scattering processes in the interaction of laser radiation with polyamide 12 powder." Proceedings of the 11th CIRP Conference on Photonic Technologies, LANE 2020 Ed. M. Schmidt, F. Vollertsen, E. Govekar, Elsevier B.V., 2020. 85-88.

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