Characterization of temperature-dependent optical material properties of polymer powders
Laumer T, Stichel T, Bock T, Amend P, Schmidt M (2015)
Publication Type: Conference contribution
Publication year: 2015
Journal
Publisher: American Institute of Physics Inc.
Book Volume: 1664
Conference Proceedings Title: AIP Conference Proceedings
Event location: Cleveland, OH
ISBN: 9780735413092
DOI: 10.1063/1.4918508
Abstract
In former works, the optical material properties of different polymer powders used for Laser Beam Melting (LBM) at room temperature have been analyzed. With a measurement setup using two integration spheres, it was shown that the optical material properties of polymer powders differ significantly due to multiple reflections within the powder compared to solid bodies of the same material. Additionally, the absorption behavior of the single particles shows an important influence on the overall optical material properties, especially the reflectance of the powder bed. Now the setup is modified to allow measurements at higher temperatures. Because crystalline areas of semi-crystalline thermoplastics are mainly responsible for the absorption of the laser radiation, the influence of the temperature increase on the overall optical material properties is analyzed. As material, conventional polyamide 12 and polypropylene as new polymer powder material, is used. By comparing results at room temperature and at higher temperatures towards the melting point, the temperature-dependent optical material properties and their influence on the beam-matter interaction during the proceb are discubed. It is shown that the phase transition during melting leads to significant changes of the optical material properties of the analyzed powders.
Authors with CRIS profile
Tobias Laumer
Lehrstuhl für Photonische Technologien (LPT)
Philipp Amend
Lehrstuhl für Photonische Technologien (LPT)
Michael Schmidt
Lehrstuhl für Photonische Technologien (LPT)
Additional Organisation(s)
Erlangen Graduate School in Advanced Optical Technologies (SAOT)
Sonderforschungsbereich 814/3 Additive Fertigung
Involved external institutions
Germany (DE)How to cite
APA:
Laumer, T., Stichel, T., Bock, T., Amend, P., & Schmidt, M. (2015). Characterization of temperature-dependent optical material properties of polymer powders. In Sadhan C. Jana (Eds.), AIP Conference Proceedings. Cleveland, OH, US: American Institute of Physics Inc..
MLA:
Laumer, Tobias, et al. "Characterization of temperature-dependent optical material properties of polymer powders." Proceedings of the 30th International Conference of the Polymer Processing Society, PPS 2014, Cleveland, OH Ed. Sadhan C. Jana, American Institute of Physics Inc., 2015.
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