Surface nanocrystallization and biomedical performance of Ti-Ta laminated composite processed by surface mechanical grinding treatment

• Published in: Applied surface science Vol. 623; p. 157051
• Main Authors: Zhang, Huibin, Shen, Kaijie, Lan, Junjie, Xu, Shenghang, Chen, Hongyu, Fu, Ao, Lin, Junpin, Cao, Huazhen, Zheng, Guoqu
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 30-06-2023
• Subjects: Friction behavior; Hydroxyapatite; Medical titanium alloy; Nanocrystallization; Surface mechanical grinding treatment; Ti-Ta composite; Nanocrystallization; Hydroxyapatite; Friction behavior; Medical titanium alloy; Ti-Ta composite; Surface mechanical grinding treatment
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2023.157051

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•Ti-Ta laminated composite was processed by surface mechanical grinding treatment.•Surface nanocrystallization was achieved by surface mechanical grinding treatment.•Mechanical performance of Ti-Ta laminated composite was improved by SMGT.•The wear rate of Ti-Ta-SMGT was reduced by 20% in simulated body fluid.•The density of bacterial adhesion on Ti-Ta-SMGT surface was reduced to 2.35 × 105 Cell/cm2.
Ti-Ta laminated composites suffer from the inadequate wear resistance and deficient antibacterial properties. To promote their application, surface mechanical grinding treatment (SMGT) was employed to modify their surface physicochemical properties. This work systematically investigated the microstructure, phase composition, roughness, biological activity, friction and wear behaviors as well as anti-bacterial adhesion effect of Ti-Ta SMGT samples. The results showed that the nanocrystallization of the Ti-Ta laminated composites after SMGT was achieved, and the strength and elastic modulus met the requirements of the third-generation medical titanium alloys. The modification of the surface properties such as roughness, hardness, chemical state and surface energy improved their tribological properties in simulated body fluids and prevented the anti-bacterial adhesion for staphylococcus aureus, indicating the promising prospect of Ti-Ta SMGT samples for biomedical applications.