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Materials 2013, 6(12), 5700-5712; doi:10.3390/ma6125700

Production of Porous β-Type Ti–40Nb Alloy for Biomedical Applications: Comparison of Selective Laser Melting and Hot Pressing

1
Leibniz Institute for Solid State and Materials Research IFW Dresden, P.O. Box 270016, Dresden D-01171, Germany
2
Institute of Materials Science, TU Dresden, Helmholtzstr. 7, Dresden D-01062, Germany
3
Institute of Physiological Chemistry, Carl Gustav Carus Faculty of Medicine, TU Dresden, Fiedlerstr. 42, Dresden D-01307, Germany
*
Author to whom correspondence should be addressed.
Received: 30 October 2013 / Revised: 18 November 2013 / Accepted: 29 November 2013 / Published: 6 December 2013
(This article belongs to the Special Issue Titanium Materials for Biomedical Application 2013)
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Abstract

We used selective laser melting (SLM) and hot pressing of mechanically-alloyed β-type Ti–40Nb powder to fabricate macroporous bulk specimens (solid cylinders). The total porosity, compressive strength, and compressive elastic modulus of the SLM-fabricated material were determined as 17% ± 1%, 968 ± 8 MPa, and 33 ± 2 GPa, respectively. The alloy’s elastic modulus is comparable to that of healthy cancellous bone. The comparable results for the hot-pressed material were 3% ± 2%, 1400 ± 19 MPa, and 77 ± 3 GPa. This difference in mechanical properties results from different porosity and phase composition of the two alloys. Both SLM-fabricated and hot-pressed cylinders demonstrated good in vitro biocompatibility. The presented results suggest that the SLM-fabricated alloy may be preferable to the hot-pressed alloy for biomedical applications, such as the manufacture of load-bearing metallic components for total joint replacements.
Keywords: novel β-phase Ti-based alloys; static biomechanical behavior; cytotoxicity and cell proliferation novel β-phase Ti-based alloys; static biomechanical behavior; cytotoxicity and cell proliferation
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Zhuravleva, K.; Bönisch, M.; Prashanth, K.G.; Hempel, U.; Helth, A.; Gemming, T.; Calin, M.; Scudino, S.; Schultz, L.; Eckert, J.; Gebert, A. Production of Porous β-Type Ti–40Nb Alloy for Biomedical Applications: Comparison of Selective Laser Melting and Hot Pressing. Materials 2013, 6, 5700-5712.

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