Abstract
Medical titanium alloy has attracted wide attention because of its low elastic modulus (close to bone tissue) and low toxicity. Surface modification treatment by micro-arc oxidation (MAO) on the near-β non-toxic Ti-3Zr-2Sn-3Mo-25 Nb (TLM) titanium alloy was conducted, graphene oxide (GO) was used as modified additive to improve the comprehensive performances especially the ability of inducing hydroxyapatite. The influence of GO particles on the structure, composition and performance were measured and analyzed. Results showed that, GO was successfully participated in the coating formation process, some micropores and cracks were sealed and diminished, reduced the surface roughness. Even though the thickness was decreased, the density was significantly increased. In addition, the critical load strength increased 34%, and lowered the friction coefficient 50%. The electrochemical measurements proved that GO has gain effect on the corrosion resistance of the MAO coating. After immersed in SBF, more HA phase was formed on GO-MAO coating, showing more promising biocompatibility.
NSTL
Elsevier