We gratefully acknowledge the financial support of the German Ministry for Research and Education (BMBF) in the “Innovative Medicine” programme (project REFAMAG, grant no. 01EZ1008B). We wish to thank Dr. Norbert Hort, Helmholtz Center Geesthacht, MagIC – Magnesium Innovation Center, for the supply of the W4 and WZ21 ingot material.
Highly Porous Magnesium Alloy Structures and Their Properties Regarding Degradable Implant Application†
Article first published online: 11 NOV 2013
© 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Advanced Engineering Materials
Special Issue: Cellular Materials
Volume 16, Issue 3, pages 309–318, March 2014
How to Cite
Morgenthal, I., Andersen, O., Kostmann, C., Stephani, G., Studnitzky, T., Witte, F. and Kieback, B. (2014), Highly Porous Magnesium Alloy Structures and Their Properties Regarding Degradable Implant Application. Adv. Eng. Mater., 16: 309–318. doi: 10.1002/adem.201300130
- Issue published online: 14 MAR 2014
- Article first published online: 11 NOV 2013
- Manuscript Accepted: 23 SEP 2013
- Manuscript Received: 10 APR 2013
- German Ministry for Research and Education (BMBF) in the “Innovative Medicine” programme (project REFAMAG). Grant Number: 01EZ1008B
Magnesium alloys offer excellent properties with regard to application as degradable implant. For bone implants, it is often desirable to use porous materials. However, the preparation of high-porosity magnesium implants has been difficult so far. The present study uses melt extracted magnesium fibers as the starting material for the sintering of highly porous magnesium bodies, i.e., from alloys MgY4 (W4) and MgY2Zn1CaMn (WZ21). Single short fibers of these alloys with an equivalent diameter between 100 and 250 µm and a length of 4–8 mm are manufactured by melt extraction. Thermodynamic calculations are used to determine the best conditions for liquid phase sintering of these Mg alloys. As no organic or other substances are needed in the process, it is possible to obtain high-purity, high-porosity (up to 75%) bodies with exclusively open porosity. Metallographic studies as well as mechanical and corrosion testing experiments complete this work.