Ti-Zr-Nb based BCC solid solution alloy containing trace Cu and Ag with low modulus and excellent antibacterial properties. (June 2022)

• Record Type: Journal Article
• Authors: Bao, Xiaotong; Maimaitijuma, Talatibaike; Yu, Bingxiao; Li, Xuan; Xi, Guoguo; Liu, Shanshan; Cao, Yongping; Zhang, Tao
• Is Part Of: Materials today communications. Volume 31(2022)
• Publication Date: 2022-06
• Subjects: Biomedical alloys -- Low modulus -- Mechanical properties -- Antibacterial properties -- Biocompatibilities; Materials science -- Periodicals; 620.11
• DOI: 10.1016/j.mtcomm.2022.103180
• Languages: English
• ISSNs: 2352-4928

Abstract

Abstract: A new series of β-type biomedical alloys Ti50 Zr25 Nb20 Cu5−x Agx (x = 0, 1 and 2.5 at%) have been developed. Mechanical properties, antibacterial properties, and biocompatibility of the alloys were systematically investigated. These alloys are body-centered cubic (BCC) phase solid solution with dendritic structure and excellent yield strength and hardness. Meanwhile, the alloys exhibit low Young's modulus (~61 GPa) which is only half of the Ti-6Al-4 V alloy and close to the level of human bone modulus. Due to the increases of the total content of Cu 2+ and Ag + ions with the Ag partial substitution of Cu, the antibacterial properties of the alloys improves significantly and the antibacterial rate of Ti50 Zr25 Nb20 Cu2.5 Ag2.5 alloy is above 99.6%. In vitro experiments demonstrate the biocompatibility of Ti50 Zr25 Nb20 Cu2.5 Ag2.5 alloy is comparable to Ti-6Al-4 V alloy. These β-type Ti50 Zr25 Nb20 Cu5−x Agx (x = 0, 1 and 2.5 at%) alloys with superior material mechanical properties, excellent antibacterial properties and good biocompatibility have great potential for antibacterial biomedical implants and associated materials. Graphical Abstract: ga1