Graphene nanoplatelets-reinforced magnesium metal matrix nanocomposites with superior mechanical and corrosion performance for biomedical applications

作     者：Khurram Munir Cuie Wen Yuncang Li Khurram Munir;Cuie Wen;Yuncang Li

作者机构：School of EngineeringRMIT UniversityMelbourneVictoria 3001Australia 

出 版 物：《Journal of Magnesium and Alloys》 (镁合金学报（英文）)

年 卷 期：2020年第8卷第1期

页      面：269-290页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：The authors acknowledge the financial support for this research by the Australian Research Council(ARC)through the Future Fellowship(FT160100252) the Discovery Project(DP170102557) The authors also acknowledge the scientific and technical assistance of RMIT University’s Microscopy and Microanalysis Facility(RMMF) a linked laboratory of the Australian Microscopy&Microanalysis Research Facility 

主　　题：In vitro cytotoxicity Biocorrosion Magnesium-graphene composite Mechanical properties Strengthening mechanisms 

摘      要：Magnesium(Mg)metal matrix composites(MMCs)reinforced with graphene nanoplatelets(GNPs)have been developed by powder metallurgy(PM).GNPs with different concentrations(0.1,0.2,and 0.3 wt.%),layer thicknesses(5 nm and 9 nm),and particle sizes(15μm and 5μm)were dispersed into Mg powder by high-energy ball-milling *** microstructure and mechanical properties of the fabricated composites were characterized using transmission electron microscopy(TEM),scanning electron microscopy(SEM),energy dispersive X-ray spectroscopy(EDX),X-ray diffraction(XRD),Raman spectroscopy(RS),and compression *** corrosion resistance was evaluated by electrochemical tests and hydrogen evolution *** cytotoxicity of Mg-GNPs composites was assessed using osteoblast-like SaOS2 *** results indicate that GNPs are excellent candidates as reinforcements in Mg matrices for the manufacture of biodegradable Mg-based composite *** addition improved the mechanical properties of Mg via synergetic strengthening ***,retaining the structural integrity of GNPs during processing improved the ductility,compressive strength,and corrosion resistance of the Mg-GNP *** assessments did not reveal any significant toxicity with the addition of GNPs to Mg *** study demonstrates that Mg-xGNPs with x0.3 wt.%,may constitute novel biodegradable implant materials for load-bearing applications.