Nanostructured Ti‐Zr‐Pd‐Si‐(Nb) bulk metallic composites: Novel biocompatible materials with superior mechanical strength and elastic recovery. Issue 8 (23rd December 2014)

• Record Type: Journal Article
• Authors: Hynowska, A.; Blanquer, A.; Pellicer, E.; Fornell, J.; Suriñach, S.; Baró, M. D.; Gebert, A.; Calin, M.; Eckert, J.; Nogués, C.; Ibáñez, E.; Barrios, L.; Sort, J.
• Is Part Of: Journal of biomedical materials research. Volume 103:Issue 8(2015:Nov.)
• Page Start: 1569
• Page End: 1579
• Publication Date: 2014-12-23
• Subjects: Biomedical materials -- Periodicals; 610.28
• DOI: 10.1002/jbm.b.33346
• Languages: English
• ISSNs: 1552-4973

Abstract

<abstract abstract-type="main"> <title>Abstract</title> <p>The microstructure, mechanical behaviour, and biocompatibility (cell culture, morphology, and cell adhesion) of nanostructured Ti<sub>45</sub>Zr<sub>15</sub>Pd<sub>35‐</sub><italic><sub>x</sub></italic>Si<sub>5</sub>Nb<italic><sub>x</sub></italic> with <italic>x</italic> = 0, 5 (at. %) alloys, synthesized by arc melting and subsequent Cu mould suction casting, in the form of rods with 3 mm in diameter, are investigated. Both Ti‐Zr‐Pd‐Si‐(Nb) materials show a multi‐phase (composite‐like) microstructure. The main phase is cubic β‐Ti phase (<italic>Im</italic>3<italic>m</italic>) but hexagonal α‐Ti (<italic>P63/mmc</italic>), cubic TiPd (<italic>Pm3m</italic>), cubic PdZr (<italic>Fm</italic>3<italic>m</italic>), and hexagonal (Ti, Zr)<sub>5</sub>Si<sub>3</sub> (<italic>P63/mmc</italic>) phases are also present. Nanoindentation experiments show that the Ti<sub>45</sub>Zr<sub>15</sub>Pd<sub>30</sub>Si<sub>5</sub>Nb<sub>5</sub> sample exhibits lower Young's modulus than Ti<sub>45</sub>Zr<sub>15</sub>Pd<sub>35</sub>Si<sub>5</sub>. Conversely, Ti<sub>45</sub>Zr<sub>15</sub>Pd<sub>35</sub>Si<sub>5</sub> is mechanically harder. Actually, both alloys exhibit larger values of hardness when compared with commercial Ti‐40Nb, (H<sub>Ti‐Zr‐Pd‐Si</sub> ≈ 14 GPa, H<sub>Ti‐Zr‐Pd‐Si‐Nb</sub> ≈ 10 GPa and H<sub>Ti‐40Nb</sub> ≈ 2.7 GPa). Concerning the biological behaviour, preliminary results of cell viability performed on several Ti‐Zr‐Pd‐Si‐(Nb) discs indicate that the number of live cells is superior to 94% in both cases. The studied Ti‐Zr‐Pd‐Si‐(Nb) bulk metallic system is thus interesting for biomedical applications because of the outstanding mechanical properties (relatively low Young's modulus combined with large hardness), together with the excellent biocompatibility. © 2014 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 103B: 1569–1579, 2015.</p> </abstract>