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In situ alloying Ti–Ag antibacterial biomaterials via laser powder bed fusion: Microstructure, mechanical properties and bioperformance

Authors :
Changhui Song
Yongqi Chen
Lisha Liu
Haoyang Lei
Xinji Yang
Jian Hu
Qian Li
Yongqiang Yang
Yueyue Li
Source :
Materials Today Advances, Vol 20, Iss , Pp 100445- (2023)
Publication Year :
2023
Publisher :
Elsevier, 2023.

Abstract

Antibacterial properties are critical for implants, while general pure titanium implants are bioinert. Adding nano Ag to metals is an effective strategy to obtain antibacterial properties. However, the comprehensive properties of Ti–Ag alloy prepared by traditional methods are not satisfactory. In this paper, Ti–5Ag alloy with an antibacterial rate close to 100 % was synthesized in situ by laser powder bed fusion (LPBF), and its microstructure and properties were studied systematically. Phase analysis demonstrated the existence of Ti2Ag which played an important role in gaining excellent antibacterial properties. Benefiting from in situ laser alloying, the elements were homogeneously distributed, which endowed the Ti–5Ag alloy with excellent mechanical properties and corrosion resistance. The tensile strength and elongation reached 716 MPa and 33.51 %, respectively. Furthermore, through the design of triply periodic minimal surface (TPMS) structures, mechanical properties matching human bone were obtained. Based on LPBF-printed Ti–5Ag alloy and TPMS structures, this paper provides a feasible method for the manufacturing of bone implants with excellent comprehensive properties.

Details

Language :
English
ISSN :
25900498
Volume :
20
Issue :
100445-
Database :
Directory of Open Access Journals
Journal :
Materials Today Advances
Publication Type :
Academic Journal
Accession number :
edsdoj.4f0d3daf3fd437fbfbbb8932e1241b1
Document Type :
article
Full Text :
https://doi.org/10.1016/j.mtadv.2023.100445