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Flexible Powder Production for Additive Manufacturing of Refractory Metal-Based Alloys

Hinrichs, Frauke; Kauffmann, Alexander; Schliephake, Daniel; Seils, Sascha; Obert, Susanne; Ratschbacher, Karin; Allen, Melissa; Pundt, Astrid; Heilmaier, Martin


The quality and properties of metal powders are essential for powder metallurgical (PM) processes in general and for additive manufacturing (AM) processing routes in particular. Thus, a variety of atomization technologies were established meeting the multiple needs of the different processing technologies. However, the production of refractory metal alloy powder remains challenging due to their high liquidus temperatures (>2000 °C), the formation of brittle intermetallic phases, as well as the reactivity with and sensitivity to interstitials of the constituting elements. In this contribution, powders made of Mo-20Si-52.8-Ti (at.%) were produced by a novel ultrasonic atomization (UA) process at laboratory-scale using an industrial electrode induction gas atomization (EIGA) process with a modified electrode concept for the first time. UA allows flexibility in alloy composition due to the arc melting-based principle, while the EIGA electrode is PM manufactured from elemental powders to provide similar flexibility on a larger scale. The powders resulting from these two processes were compared with respect to size distribution, sphericity, microstructure and phase constitution, chemical composition, and interstitial impurity content. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000139513
Veröffentlicht am 29.10.2021
DOI: 10.3390/met11111723
Zitationen: 3
Web of Science
Zitationen: 2
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Graduiertenkolleg 2561: Materials Compounds from Composite Materials (GRK 2561)
Institut für Angewandte Materialien – Werkstoffkunde (IAM-WK)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2075-4701
KITopen-ID: 1000139513
Erschienen in Metals
Verlag MDPI
Band 11
Heft 11
Seiten Article no: 1723
Vorab online veröffentlicht am 28.10.2021
Schlagwörter additive manufacturing; powder properties; refractory metal alloy; molybdenum silicides; Mo-Si-Ti; ultrasonic atomization; gas atomization
Nachgewiesen in Dimensions
Web of Science
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