MACHINABLE TRICALCIUM PHOSPHATE/LANTHANUM PHOSPHATE COMPOSITES

Ergun C.

32nd International Conference on Advanced Ceramics and Composites, Florida, Amerika Birleşik Devletleri, 27 Ocak - 01 Şubat 2008, cilt.29, ss.53-62 identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası: 29
  • Basıldığı Şehir: Florida
  • Basıldığı Ülke: Amerika Birleşik Devletleri
  • Sayfa Sayıları: ss.53-62
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

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.