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Metals 2016, 6(5), 118; doi:10.3390/met6050118

Metal Injection Molding (MIM) of Magnesium and Its Alloys

1
Helmholtz-Zentrum Geesthacht, Centre for Materials and Coastal Research, Institute of Materials Research, Division Metallic Biomaterials, Max-Planck Straße 1, Geesthacht D-21502, Germany
2
Maschinenbau, Verfahrenstechnik und Maritime Technologien, University of Applied Sciences, Hochschule Flensburg, Kanzleistraße 91-93, Flensburg D-24943, Germany
3
Fakultät für Maschinenbau, Helmut Schmidt University, Holstenhofweg 85, Hamburg D-22043, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Hugo F. Lopez
Received: 24 March 2016 / Revised: 12 May 2016 / Accepted: 13 May 2016 / Published: 20 May 2016
(This article belongs to the Special Issue Metal Injection Moulding)
View Full-Text   |   Download PDF [4283 KB, uploaded 20 May 2016]   |  

Abstract

Current research has highlighted that magnesium and its alloys as biodegradable material are highly suitable for biomedical applications. The new material fully degrades into nontoxic elements and offers material properties matching those of human bone tissue. As biomedical implants are rather small and complex in shape, the metal injection molding (MIM) technique seems to be well suited for the near net shape mass production of such parts. Furthermore, MIM of Mg-alloys is of high interest in further technical fields. This study focusses on the performance of MIM-processing of magnesium alloy powders. It includes Mg-specific development of powder blending, feedstock preparation, injection molding, solvent and thermal debinding and final sintering. Even though Mg is a highly oxygen-affine material forming a stable oxide layer on each particle surface, the material can be sintered to nearly dense parts, providing mechanical properties matching those of as cast material. An ultimate tensile strength of 142 MPa, yield strength of 67 MPa, elastic modulus of 40 GPa and 8% elongation at fracture could be achieved using novel organic polymer binders for the feedstock preparation. Thus, first implant demonstrator parts could be successfully produced by the MIM technique. View Full-Text
Keywords: magnesium; sintering; metal injection molding; MIM; biodegradable magnesium; sintering; metal injection molding; MIM; biodegradable
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MDPI and ACS Style

Wolff, M.; Schaper, J.G.; Suckert, M.R.; Dahms, M.; Feyerabend, F.; Ebel, T.; Willumeit-Römer, R.; Klassen, T. Metal Injection Molding (MIM) of Magnesium and Its Alloys. Metals 2016, 6, 118.

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