کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
791750 | 1466767 | 2008 | 7 صفحه PDF | دانلود رایگان |
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.
Journal: Journal of Materials Processing Technology - Volume 199, Issues 1–3, 1 April 2008, Pages 178–184