New Ti-based Ti–Cu–Zr–Fe–Sn–Si–Ag bulk metallic glass for biomedical applications

•Novel Ti47Cu38Zr7.5Fe2.5Sn2Si1Ag2 (at.%) bulk metallic glass (BMG) with a critical diameter of 7mm was discovered.•The present BMG is the largest Ni- and Be-free Ti-based BMG containing low content of noble metal reported to date.•The glassy alloy possesses high specific strength, low Young’s modul...

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Bibliographic Details
Published in:Journal of alloys and compounds 2015-03, Vol.625, p.323-327
Main Authors: Pang, Shujie, Liu, Ying, Li, Haifei, Sun, Lulu, Li, Yan, Zhang, Tao
Format: Article
Language:English
Subjects:
Alloys
Amorphous materials
Biocompatibility
Bulk metallic glass
Corrosion resistance
Glassy
Mechanical properties
Nickel
Surgical implants
Ti-based alloy
Titanium
Titanium base alloys
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Summary:•Novel Ti47Cu38Zr7.5Fe2.5Sn2Si1Ag2 (at.%) bulk metallic glass (BMG) with a critical diameter of 7mm was discovered.•The present BMG is the largest Ni- and Be-free Ti-based BMG containing low content of noble metal reported to date.•The glassy alloy possesses high specific strength, low Young’s modulus, and good corrosion resistance and bio-compatibility.•Combination of high glass-forming ability and good mechano- and bio-compatibility for the Ti-based BMG demonstrates the potential for use in biomedical applications. A novel Ni-free Ti47Cu38Zr7.5Fe2.5Sn2Si1Ag2 (at.%) bulk metallic glass (BMG) with superior glass-forming ability, good mechanical properties and excellent biocompatibility was discovered. The Ti-based BMG with a diameter of 7mm can be prepared by copper mold casting and the supercooled liquid region was 52K. Compressive strength, specific strength, Young’s modulus and microhardness of the Ti-based BMG were about 2.08GPa, 3.2×105Nm/kg, 100GPa and 588Hv, respectively. Electrochemical measurements indicated that the Ti-based glassy alloy possesses higher corrosion resistance than Ti–6Al–4V alloy in a simulated body fluid environment. Attachment, spreading out and proliferation of MC3T3-E1 cells on the Ti-based BMG surface demonstrated the excellent biocompatibility. Mechanisms of the formation and properties for the Ti-based glassy alloy are also discussed. The combination of high glass-forming ability, excellent mechanical properties, high corrosion resistance and good biocompatibility demonstrates the potential of the Ni-free Ti-based BMG for use in biomedical applications.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2014.07.021