N. Emminghaus
S. Fritsch
H. Büttner
J. August
M. Tegtmeier
M. Huse
M. Lammers
C. Hoff
J. Hermsdorf
S. Kaierle

PBF-LB/M process under a silane-doped argon atmosphere: Preliminary studies and development of an innovative machine concept

Advances in Industrial and Manufacturing Engineering
2
100040
2021
Type: Zeitschriftenaufsatz (reviewed)
Abstract
In laser-based powder bed fusion of metals (PBF-LB/M) the presence of oxygen is known to encourage embrit-tlement and impair the wetting properties of the substrate and solidified material. Conventionally, inert gases likeargon are used to reduce the residual oxygen content within the processing atmosphere. However, especially interms of reactive materials like titanium the remaining oxygen still causes critical oxidations.In this publication, a new approach for obtaining an oxygen-free processing atmosphere is presented. Therebythe argon shielding gas is doped with reactive monosilane to reduce the residual oxygen content to a rangecomparable to XHV (Extreme High Vacuum, thermodynamic oxygen activity