MACHINABLE TRICALCIUM PHOSPHATE/LANTHANUM PHOSPHATE COMPOSITES


Ergun C.

32nd International Conference on Advanced Ceramics and Composites, Florida, United States Of America, 27 January - 01 February 2008, vol.29, pp.53-62 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 29
  • City: Florida
  • Country: United States Of America
  • Page Numbers: pp.53-62

Abstract

Tricalcium phosphate (TCP) composites with lanthanum phosphate were prepared with pressureless air sintering at 500, 700, 900, 1100 and 1300 degrees C for 2 hrs. The composites were characterized in terms of phase stability during sintering, microstructural evaluation with XRD, SEM and machinability with simple drilling operation. Tricalcium phosphate and lanthanum phosphate phases were stable up to 1100 degrees C. However, partial reaction forming Ca(8)La(2)(PO(4))(6)O(2) was observed during sintering at 1300 degrees C. As a result, tricalcium phosphate and lanthanum phosphate composites sintered at 1100 degrees C showed phase stability insuring weak interface. Thus, these composites fulfilled the requirement for machinability.