Abstract
Hydroxylapatite (HA) and tricalcium phosphate (TCP) composites with lanthanum phosphate were prepared with pressureless air sintering at 500, 700, 900, 1100 and 1300 °C for 2 h. The composites were characterized in terms of phase stability during sintering, microstructural evaluation with XRD, SEM and machinability with simple drilling operation. At sintering temperatures higher than 700 °C, hydroxylapatite and lanthanum phosphate phases reacted and formed Ca8La2(PO4)6O2. On the other hand, tricalcium phosphate and lanthanum phosphate composites were stable up to 1100 °C. However, partial reaction was observed during sintering at 1300 °C. As a result, tricalcium phosphate and lanthanum phosphate composites sintered at 1100 °C showed phase stability insuring weak interface. Thus, these composites fulfilled the requirement for machinability.
Original language | English |
---|---|
Pages (from-to) | 178-184 |
Number of pages | 7 |
Journal | Journal of Materials Processing Technology |
Volume | 199 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1 Apr 2008 |
Keywords
- Biomaterials
- Composites
- Hydroxylapatite
- Lanthanum phosphate
- Machinable ceramics
- Tricalcium phosphate