Fabrication of Zr-Ti-Si glassy metallic overlay on 3D printed Ti-6Al4V implant prototypes for enhanced biocompatibility

被引:6
作者
Subramanian, B. [1 ,2 ]
Sasikumar, P. [1 ]
Rajan, S. Thanka [3 ]
Shankar, K. Gopal [4 ]
Veerapandian, Murugan [1 ,2 ]
机构
[1] CSIR Cent Electrochem Res Inst, Karaikkudi 630003, India
[2] Acad Sci & Innovat Res AcSIR, Ghaziabad 201002, India
[3] Indian Inst Technol Madras, Dept Appl Mech, Chennai 600036, India
[4] PSG Inst Adv Studies, Dept Biotechnol, Coimbatore 641062, India
关键词
Biomaterials; Corrosion; Biocompatibility; Magnetron Sputtering; CORROSION BEHAVIOR; THIN; SHARPNESS; ALLOYS; FILMS;
D O I
10.1016/j.jallcom.2023.170933
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Implantable materials with enhanced corrosion resistance and bioactivity are highly desired for biomedical application. A 3D metal printed prototype surface was coated with amorphous alloy components of ele-ments Zr, Ti and Si (Zr54Ti35 Si11) as a novel biomedical grade ternary system for the implants. A DC magnetron sputtering technique was used to sputter the films on Ti-6Al-4 V implant prototypes, exhibiting a smooth and denser coating with root means square surface roughness of 1.4 nm. Surface morphology and structural integrity of the thin film metallic glass (TFMG) was studied from electron microscopic techniques and X-ray diffraction analysis. The TFMG is thermally stable with a large supercooled liquid region ( increment Tx) of 81.2 & DEG;C. Mechanical characteristics of the coatings were studied using the nanoindentation method to correlate the hardness and modulus of the implant materials. Under the simulated body fluid condition, Ti-6Al-4 V implant with 500 nm thickness coatings (Zr54Ti35Si11) exhibited the superior corrosion resistance rate 1 x 10-6 mpy with a charge transfer resistance of 34 k & OHM; promising for practical application. Electrochemical impedance spectra and Tafel analysis revealed that the corrosion resistance was prominent in the 500 nm thickness TFMG system than the 250 nm and uncoated bare counterparts. The in-vitro biocompatibility and cytotoxicity studies of the as-coated 3D printed implants were studied using the human osteoblast and L929 fibroblast cell lines, respectively. A hemocompatibility study on the implant materials revealed that erythrocytes remain biconcave without aggregation, platelet activation and thrombogenesis, supporting the biocompatibility of the implants. The integration of such unique properties makes these TFMG system ideal candidates for biomedical implants.& COPY; 2023 Elsevier B.V. All rights reserved.
引用
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页数:10
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