Affordable Access

Publisher Website

Injection moulded hydroxyapatite ceramics

Authors
Journal
Biomaterials
0142-9612
Publisher
Elsevier
Publication Date
Volume
17
Issue
19
Identifiers
DOI: 10.1016/0142-9612(95)00243-x
Keywords
  • Injection Moulding
  • Hydroxyapatite
  • Sintering
  • Properties

Abstract

Abstract The injection moulding of hydroxyapatite (HA) and properties (relative density, shrinkage, microstructure, thermal strength and phase composition) of HA ceramics sintered at temperatures of 1373–1773 K were studied. Particles of oval shape and size of 0.5 μm were most suitable for injection moulding. Polymer/HA mixture contained 63 vol% of the HA powder. Maximum relative density (98.7%) and shrinkage (16%) of HA ceramics were obtained at a sintering temperature of 1523 K. Maximum flexural strength (60 MPa) of HA ceramics occurred at a sintering temperature of 1473 K. The strength of these ceramics decreased at sintering temperatures higher than 1473 K. Loss in strength was owing to the grain growth and decomposition of HA ceramics. The relationship between grain size and strength is described by the equation: σ = 53.3d 1 2 . The calculated activation energy of grain growth obtained was 215 kJ mol −1 K −1. The decomposition of HA to α-tricalcium phosphate was important at temperatures greater than 1573 K.

There are no comments yet on this publication. Be the first to share your thoughts.

Statistics

Seen <100 times
0 Comments

More articles like this

Thermal debinding of injection moulded ceramics

on Journal of the European Cerami... Jan 01, 1997

Effect of powder treatment on injection moulded zi...

on Journal of the European Cerami... Jan 01, 2000

Binder removal from injection moulded zirconia cer...

on Ceramics International Jan 01, 1999
More articles like this..