The Combined Influence of Graphene and Copper on the In-Vitro Corrosion Properties and Biocompatibility of a Magnesium Metal Matrix Composite

Author : Song-Jeng Huang, Sivakumar Selvaraju, Murugan Subramani, Chuan Li

Abstract :This study aims to develop a biodegradable magnesium (Mg) material that combines strength, lightness, and excellent corrosion resistance for biomedical use. AZ31 Mg alloy was reinforced with 0.1 wt% graphene (Gr) and varying amounts of copper (Cu) (0.15 and 0.3 wt%) using mechanical stir casting. The composites' properties were evaluated through microstructural analysis, hardness, compression testing, and corrosion tests. Results showed significant improvements in mechanical strength and corrosion resistance, with compression strength increasing from 364 MPa to 394 MPa and corrosion rate dropping from 9.17 mils/year to 0.135 mils/year. Cytotoxicity tests indicated dose dependent effects on Wharton’s jelly mesenchymal stem cells, with higher Cu levels reducing cell viability. These findings highlight the potential of Mg-based composites for future biomedical implants with tailored properties.

Keywords :Biomaterials, Magnesium Composites, Microstructural Analysis, Mechanical Properties, Biocompatibility, In-Vitro Immersion and Electrochemical Corrosion.

Conference Name :International Conference on Science, Engineering & Technology (ICSET-25)

Conference Place Colombo, Sri Lanka

Conference Date 12th Feb 2025