Zn Bi composite for orthopedic implant applications
Year: 2026
Type: article
Abstract: Zn-based biodegradable metals have emerged as promising options for temporary or permanent biomedical implants; however, their limited mechanical strength and inconsistent corrosion behavior limit their clinical use. In this study, Zn–Bi composites with different Bi compositions (0.5, 1, and 2 wt.%) were produced using powder metallurgy to evaluate their compression strength, surface contact angle, microhardness, electrochemical properties, and corrosion resistance. Phase analysis and thermal stability were examined using X-ray diffraction (XRD) and thermogravimetric/differential thermal analysis (TG/DTA), while the surface morphology was analyzed using field-emission scanning electron microscopy (FE-SEM). Zn-Bi composites have a hydrophilic nature in all Bi-containing samples. The Zn–Bi composites demonstrated ultimate compressive strengths of 356.67 MPa (Zn–0.5 wt.% Bi), 331 MPa (Zn–1 wt.% Bi), and 332.90 MPa (Zn–2 wt.% Bi). The Zn–0.5 wt.% Bi composite exhibited the lowest corrosion rate of 30.77 mm/year in 0.9 wt.% NaCl, and Zn–0.5 wt.% Bi composite demonstrated excellent biocompatibility (99% MG-63 viability) and antibacterial activity. These results indicate the potential of Zn-Bi composites as a promising biodegradable implant material.
Source: Materials Today Communications
Authors: S. Basith Ali, R. Radha, Saheli Karmakar
Institution: Vellore Institute of Technology University
Language: English
Subfield: Biomaterials
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $2,830
Funder: VIT University
OpenAlex ID: W7166320888