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Qualification and modification of new polymer powders for laser beam melting using Ulbricht spheres

  • The restricted amount of available materials for Laser Beam Melting (LBM) of polymers is one of the main limitations for expanding the technology. Current qualification methods deal with problems like inadequate powder flowability or high part porosities among others but do not offer a detailed analysis of the important beam-matter-interaction between powder particles and electro-magnetic laser radiation. In this paper, polyethylene powder is qualified for the LBM process and specifically analyzed regarding the optical material properties of the powder for a wavelength of 10.6 μm. By admixing graphite as absorption intensifier the change of the optical material properties and the thereby connected processing parameters are analyzed. Furthermore an explanation approach is given to explain the relation between different transmittances of different powder particles and the optical material properties of the polymer powders.

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Metadaten
Author:Tobias LaumerORCiDGND, T. Stichel, M. Sachs, Philipp AmendGND, Michael Schmidt
URL / DOI:https://www.researchgate.net/publication/286311000_Qualification_and_modification_of_new_polymer_powders_for_laser_beam_melting_using_Ulbricht_spheres
ISBN:978-1-138-00137-4
ISBN:1138001376
Parent Title (English):High value manufacturing : Advanced research in virtual and rapid prototyping ; Proceedings of the 6th International Conference on Advanced Research and Rapid Prototyping, Leiraia, Portugal, 1-5 October, 2013
Publisher:CRC Press
Place of publication:Boca Raton
Editor:Paulo Bártolo
Document Type:conference proceeding (article)
Language:English
Year of first Publication:2014
Release Date:2022/11/25
First Page:255
Last Page:260
Institutes:Fakultät Maschinenbau
Fakultät Maschinenbau / Labor Additive and Intelligent Manufacturing for Sustainability (AIMS)
Publication:Externe Publikationen
research focus:Produktion und Systeme
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG