Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10626338 | Ceramics International | 2011 | 4 Pages |
Abstract
Hydroxylapatite/CaTiO3 and tricalcium phosphate/CaTiO3 composites were prepared by pressureless air sintering and characterized in terms of phase stability, microstructure and pole drilling for their suitability for machining. In hydroxylapatite/CaTiO3 composites, Ti incorporation into the apatite structure caused lattice shrinkage and eventual decomposition of the hydroxylapatite associated with the formation of α-tricalcium phosphate during sintering at 1100 °C. Later, α-tricalcium phosphate disappeared at 1300 °C, possibly reacting with CaTiO3 at the expense of both phases. On the other hand, tricalcium phosphate/CaTiO3 composites were thermally stable up to 1100 °C insuring a weak interface between the components, which is one of the requirements for machinability in ceramic composites. Drilling tests also verified their suitability for machining.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Celaletdin Ergun,