Influence of flow aid additives on optical properties of polyamide for Laser-Based Powder Bed Fusion

Marschall M, Heintges C, Schmidt M (2022)

Publication Language: English

Publication Type: Journal article

Publication year: 2022

Journal

Procedia CIRP Curran

Original Authors: Maximilian Marschall, Christopher Heintges, Michael Schmidt

Book Volume: 111

Pages Range: 51-54

URI: https://www.sciencedirect.com/science/article/pii/S2212827122009970

DOI: 10.1016/j.procir.2022.08.114

Open Access Link: https://doi.org/10.1016/j.procir.2022.08.114

Abstract

Aim of this paper is to investigate the influence of flow aid additives on beam matter interaction of polyamide for laser-based powder bed fusion of polymers (PBF-LB/P). The optical energy input determines the laser beam powder interaction, quantified by absorption within the optical properties of a material. Additives like fumed silica for increasing powder flowability are important for using PBF-LB/P materials. The aid of those additives and restrictions in mechanical properties of built components using high portions of additives are already investigated, but not the change in relevant optical properties. Dry blends of polyamide powder with different weight percentage of additives, such as fumed silica, alumina and titania are investigated. A measurement system with a double-integrating-sphere setup and CO2 laser is used to characterize the beam matter interaction as the absorptance of optical energy in the powder layer. Based on this, the change in absorptance due to the influence of flow aid additives is nvestigated in order to be able to estimate possible effects on the processability.

Authors with CRIS profile

Maximilian Marschall Lehrstuhl für Photonische Technologien Michael Schmidt Lehrstuhl für Photonische Technologien

Additional Organisation(s)

Erlangen Graduate School in Advanced Optical Technologies Lehrstuhl für Photonische Technologien Sonderforschungsbereich 814/3 Additive Fertigung

Related research project(s)

Process-adapted material characterization for laser beam melting (A3) (SFB 814 (A3)) CRC 814 - Additive Manufacturing (SFB 814) July 1, 2011 - June 30, 2023

Involved external institutions

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

How to cite

APA:

Marschall, M., Heintges, C., & Schmidt, M. (2022). Influence of flow aid additives on optical properties of polyamide for Laser-Based Powder Bed Fusion. Procedia CIRP, 111, 51-54. https://dx.doi.org/10.1016/j.procir.2022.08.114

MLA:

Marschall, Maximilian, Christopher Heintges, and Michael Schmidt. "Influence of flow aid additives on optical properties of polyamide for Laser-Based Powder Bed Fusion." Procedia CIRP 111 (2022): 51-54.

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