Characterisation of Mg biodegradable stents produced by magnetron sputtering

Electron Microscopy and Analysis Group Conference 2015

Elmrabet, N.^1 ; Botterill, N.^1 ; Grant, D.M.^1 ; Brown, P.D.^1

Department of Mechanical, Materials and Manufacturing Engineering, Faculty of Engineering, University of Nottingham, University Park, Nottingham

NG7 2RD, United Kingdom^1

关键词: Annealing temperatures;    Biodegradable stents;    Columnar grain structure;    Elevated temperature;    Equi-axed grains;    Hardness and corrosion;    Material densification;    PVD magnetron;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/644/1/012036/pdf
DOI  :  10.1088/1742-6596/644/1/012036

来源: IOP

【 摘 要 】

Novel Mg-minitubes for biodegradable stent applications have been produced using PVD magnetron sputtering. The minitubes were characterised, as a function of annealing temperature, using a combination of SEM/EDS, XRD and hardness testing. The as-deposited minitubes exhibited columnar grain structures with high levels of porosity. Slight alteration to the crystal structure from columnar to equiaxed grain growth was demonstrated at elevated temperature, along with increased material densification, hardness and corrosion resistance.