Biomedical Engineering Reference
In-Depth Information
E(Volts)
Figure 7.7
Potentiodynamic polarization curves of: (a) Ti-3 vol% HA,
(b) Ti-10 vol% HA, (c) Ti-20 vol% HA nanocomposites in
Ringer's solution [23].
7.3 Ti-SiO
2
Nanocomposites
Silica is chemically inert. It has good biocompatibility in the
environment of the living organism and fairly good strength properties,
particularly compressive strength. However, the toughness of
silica is low. The manufacturing of silica-titanium composites can
signiicantly improve its properties. Such nanocomposites can be
produced by mechanical alloying and powder metallurgical method
[21].
Figure 7.8
XRD spectra of Ti and SiO
2
(10 vol%) powders mechanically
alloyed for different times: (a) Ti — 0 h, (b) SiO
2
— 0 h,
(c) 20 h, (d) after annealing at 1150°C for 2 h [21].
