Microstructure, mechanical and bio-corrosion properties of Mn-doped Mg–Zn–Ca bulk metallic glass composites

https://doi.org/10.1016/j.msec.2013.05.020Get rights and content

Highlights

  • Novel Mn-doped Mg–Zn–Ca bulk metallic glass composites were made by copper mold cast.

  • The strength of the Mn-doped Mg–Zn–Ca is suitable for implant application.

  • The Mn-doped Mg–Zn–Ca alloys have significantly high bio-corrosion resistance.

  • The Mn-doped Mg–Zn–Ca alloys show better cell viabilities than that of pure Mg.

Abstract

The effects of Mn substitution for Mg on the microstructure, mechanical properties, and corrosion behavior of Mg69  xZn27Ca4Mnx (x = 0, 0.5 and 1 at.%) alloys were investigated using X-ray diffraction, compressive tests, electrochemical treatments, and immersion tests, respectively. Microstructural observations showed that the Mg69Zn27Ca4 alloy was mainly amorphous. The addition of Mn decreases the glass-forming ability, which results in a decreased strength from 545 MPa to 364 MPa. However, this strength is still suitable for implant application. Polarization and immersion tests in the simulated body fluid at 37 °C revealed that the Mn-doped Mg–Zn–Ca alloys have significantly higher corrosion resistance than traditional ZK60 and pure Mg alloys. Cytotoxicity test showed that cell viabilities of osteoblasts cultured with Mn-doped Mg–Zn–Ca alloys extracts were higher than that of pure Mg. Mg68.5Zn27Ca4Mn0.5 exhibits the highest bio-corrosion resistance, biocompatibility and has desirable mechanical properties, which could suggest to be used as biomedical materials in the future.

Keywords

Mg-based alloy
Amorphous
Microstructure
Mechanical properties
Biocompatibility

Cited by (0)

View Abstract