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Nanostructured Ti‐Zr‐Pd‐Si‐(Nb) bulk metallic composites: Novel biocompatible materials with superior mechanical strength and elastic recovery
Author(s) -
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.
Publication year - 2015
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.33346
Subject(s) - materials science , microstructure , nanoindentation , biocompatibility , composite material , phase (matter) , elastic modulus , metal , metallurgy , chemistry , organic chemistry
The microstructure, mechanical behaviour, and biocompatibility (cell culture, morphology, and cell adhesion) of nanostructured Ti 45 Zr 15 Pd 35‐ x Si 5 Nb x with x = 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 ( Im 3 m ) but hexagonal α‐Ti ( P63/mmc ), cubic TiPd ( Pm3m ), cubic PdZr ( Fm 3 m ), and hexagonal (Ti, Zr) 5 Si 3 ( P63/mmc ) phases are also present. Nanoindentation experiments show that the Ti 45 Zr 15 Pd 30 Si 5 Nb 5 sample exhibits lower Young's modulus than Ti 45 Zr 15 Pd 35 Si 5 . Conversely, Ti 45 Zr 15 Pd 35 Si 5 is mechanically harder. Actually, both alloys exhibit larger values of hardness when compared with commercial Ti‐40Nb, (H Ti‐Zr‐Pd‐Si ≈ 14 GPa, H Ti‐Zr‐Pd‐Si‐Nb ≈ 10 GPa and H Ti‐40Nb ≈ 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.