Antibacterial Ti-Cu alloy with enhanced mechanical properties as implant applications

The service life as hard tissue implantation for clinical application needs compatible mechanical properties, e.g. strength, modulus, etc, and certain self-healing in case of internal infection. Therefore, for sake of improving the properties of Ti-Cu alloy, the microstructure, mechanical properties...

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Bibliographic Details
Published in:Materials research express 2020-10, Vol.7 (10), p.105404
Main Authors: Yi, ChangBo, Ke, ZunYun, Zhang, Lei, Tan, Jun, Jiang, YeHua, He, ZhengYuan
Format: Article
Language:English
Subjects:
Alloys
antibacterial property
Arc heating
Compressive strength
Copper
Corrosion currents
Corrosion resistance
Corrosion resistant alloys
E coli
Electric arc melting
Heat treatment
Lamellar structure
Mechanical properties
microstructure
Modulus of elasticity
Service life
Ti-Cu alloy
Titanium base alloys
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Summary:The service life as hard tissue implantation for clinical application needs compatible mechanical properties, e.g. strength, modulus, etc, and certain self-healing in case of internal infection. Therefore, for sake of improving the properties of Ti-Cu alloy, the microstructure, mechanical properties, corrosion resistance and antibacterial properties of Ti-xCu alloy (x = 2, 5, 7 and 10 wt.%) prepared by Ar-arc melting followed by heat treatment were studied. The results show that the Ti-Cu alloy was mainly composed of -Ti matrix and precipitated Ti2Cu phase. The Cu element mainly accumulates in the lamellar structure and forms the precipitated Ti2Cu phase. As the increase of Cu content, the lamellar Ti2Cu phase increases, the compressive strength and elastic modulus also were altered. The Ti-7Cu alloy exhibited the higher compressive strength (2169 MPa) and the lower elastic modulus (108 GPa) compared with other Ti-Cu alloys. The corrosion resistance of Ti-xCu alloys increases with the increase of Cu content. When the Cu content was greater than 5 wt.%, the value of corrosion current density for Ti-Cu alloy was less than 1 A cm−2, which is also significantly lower than that of CP-Ti. The antibacterial test revealed that only the Ti-Cu alloy with 5 wt.% or greater Cu content could display a strong antibacterial rate against E. coli and S. aureus. Therefore, the prepared Ti-7Cu alloy via heat treatment showed excellent mechanical properties, corrosion resistance, and antibacterial properties, which would meet the replacement of human hard tissue and clinical applications.
ISSN:2053-1591
2053-1591
DOI:10.1088/2053-1591/abc371