Titanium-based metallic glasses for biomedical use
(Titanbasierte metallische Gläser für biomedizinische Anwendungen)
|Metallic glasses are known to combine high strength and hardness with comparatively low Young‘s modulus values. This has raised the interest to evaluate in particular Ti-based glasses as possible biomaterials. However, alloy design demands a compromise between the achievement of high glass-forming ability and the use of non-toxic constituents. Alloys of the Ti-Zr-Si(-Nb) system can be rapidly quenched to glassy or glass-matrix (nanocomposite) states. Mechanical testing predicts high wear resistance. Corrosion tests in Ringer‘s solution revealed very low corrosion rates similar to those of beta-type Ti-Nb and stable anodic passivity. Nb addition improves the glass-forming ability and the mechanical properties and also supports a high pitting resistance even at extreme polarization. Thermal treatments are possible in a defined temperature-time window to preserve alloy’s microstructure and yield oxide films with characteristic morphologies The apatite-forming ability was proven. These properties recommend these new alloys for application as wear- and corrosion-resistant coating materials in the biomedical field.|
S. Abdi et al., Corrosion behavior and apatite-forming ability of glassy Ti75-xZr10NbxSi15 (x=0,15) alloys – potential materials for implant applications,
J. Biomed. Mater. Res. Part B 104 (2016) 27.
S. Abdi et al., Effect of Nb adition on microstructure evolution and nanomechanical properties of a glass-forming Ti-Zr-Si alloy,
Intermetallics 46 (2014) 156.
M. Calin at al., Designing biocompatible Ti-based metallic glasses for implant applications,
Mater. Sci. Eng. C 33 (2013) 875.