Microstructure in Pressureless-Sintered Iron-Containing Hydroxyapatite/Titanium Composites
Pure hydroxyapatite (HA) is brittle and it cannot be directly used for the load-bearing biomedical applications. Aim of this paper was to present a new iron-containing hydroxyapatite/titanium composites synthesized via pressureless sintering at a relatively low temperature of 1000°C using nano-sized HA powders and Ti-33%Fe mixed powders. The microstructure and composition of the new type composites were evaluated. The results showed that the uniformly distributed reinforcing particles had a unique and favorable core/shell microstructure after sintering that consisted of outer titanium and inner iron. The mechanism for the formation of the core/shell structure was discussed. The addition of iron reduced the decomposition rate of HA and the interaction between HA and titanium.
Guojun Zhang and Jessica Xu
Q. Chang et al., "Microstructure in Pressureless-Sintered Iron-Containing Hydroxyapatite/Titanium Composites", Advanced Materials Research, Vols. 160-162, pp. 1582-1587, 2011