Contact
    Start Publications Preliminary study of microstructure, mechanical properties and ...
    ←  Publication Finder
    Attension

    Preliminary study of microstructure, mechanical properties and corrosion resistance of antibacterial Ti-15Zr-xCu alloy for dental C application

    Year: 2020

    Journal: J. Mater. Sci. Technol., Volume 50, AUG 1, page 31–43

    Authors: Kolawole, Sharafadeen Kunle; Hai, Wang; Zhang, Shuyuan; Sun, Ziqing; Siddiqui, Muhammad Ali; Ullah, Ihsan; Song, Wei; Witte, Frank; Yang, Ke

    Organizations: National Key Research and Development Program of China [2018YFC1106601, 2016YFC1100600]; National NaturalScience FoundationNational Natural Science Foundation of China (NSFC) [51631009]; Youth Innovation Promotion Association, CAS [2014168]; Promoting Liaoning Province Talents Program-Top Young Talents [XLYC1807069]; CAS-TWAS President Fellowship

    Keywords: Ti-Zr alloy; Cu addition; Antibacterial; Mechanical properties; Intermetallic phases

    Ti-15Zr-xCu (3 <= x <= 7, wt.%) novel antibacterial and antibiofilm alloys with competitive mechanical properties, biological responses and corrosion resistance were designed and fabricated. Annealing heat treatment on Ti-15Zr-7Cu (TZC-7A), after holding for 2 hat slightly above their beta transus temperature (BTT) ensured their tensile strength (UTS), yield strength (YS) and hardness (HRV) were improved by 31.2%, 20% and 12.3% respectively compared to the control without Cu, Ti-15Zr (T-15ZA). Although the 3 wt.% Cu alloy displayed the highest elongation (26%), the TZC-7A alloy also possessed a good ductility. Presence of evenly dispersed Ti2Cu and Zr2Cu Cu-rich intermetallic phases formed as interwoven and alternating lamellae within the alpha + beta matrix as a result of Cu addition, as revealed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). These greatly contributed to their strengthening and bactericidal properties. Over 98% antibacterial effect against E. coli and S. aureus have been imparted, coupled with excellent biofilm inhibition. Potentiodynamic polarization curves showed that the TZC-7A alloy possessed higher corrosion resistance than commercially pure titanium, cp-Ti; contact angle test revealed enhanced hydrophilicity; while confocal laser scanning microscopy (CLSM) and cell counting kit (CCK-8) assays also displayed drastically lowered bacterial adhesion rate with comparatively no cytotoxicity. Cell attachment on all alloys was similar but the best spread was obtained on TZC-7A after 24 h. The developed alloy has good potential as an antibacterial implant material with combination of optimized properties. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
    View publication