Abstract
In this study, the interaction between hydroxyapatite (HA) and titanium (Ti) at elevated temperature in vacuum environment was investigated. The 80wt% HA-20wt% Ti powder mixtures and 90wt% HA-10wt% Ti powder mixtures were dry pressed and heat-treated at 1100°C in vacuum environment. HA powders and the commercially pure Ti powders were used as controls. The heat-treated samples were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy, scanning electron microscope (SEM) and energy disperse spectra. XRD and SEM indicated densification of metallic Ti specimens during the in-vacuum heat treatment. Heat treatment of HA specimens in vacuum resulted in the loss of hydroxyl groups as well the formation of a secondary β-tricalcium phosphate phase. Metallic Ti was not observed in the in-vacuum heat-treated HA-Ti specimens. However, α-tricalcium phosphate, tetracalcium phosphate and calcium titanium oxide were observed for the in-vacuum heat-treated HA-Ti specimens. It was concluded that the in-vacuum heat-treatment process completely converted the metal-ceramics composites to ceramic composites.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 2927-2932 |
| Number of pages | 6 |
| Journal | Biomaterials |
| Volume | 25 |
| Issue number | 15 |
| DOIs | |
| State | Published - Jul 2004 |
Keywords
- Heat treatment
- Hydroxyapatite
- Scanning electron microscopy
- Titanium
- X-ray diffraction
ASJC Scopus subject areas
- Bioengineering
- Ceramics and Composites
- Biophysics
- Biomaterials
- Mechanics of Materials