Abstract
Influence of processing time of dry ball milling for β-TCP (Ca3(PO4)2)on strength development with hydrothermal treatment was investigated. β-TCP was ground by dry ball milling for 0.5-8h and formed by uniaxial pressing. The formed body was hydrothermally treated at 180°C for 6h under saturated steam pressure. In all cases, hydroxy apatite (HAp: Ca10(PO4)6(OH)2) was formed by hydrothermal treatment. The flexural strength increased with milling time and reached the maximum value of 23.6MPa for 2h. The increase in the flexural strength by dry ball milling was caused by the increase of bulk density and contact point of fine HAp crystals.
