The effects of calcium fluoride (CaF2) additions on the densification and mechanical properties of hydroxyapatite-zirconia composites (HA-ZrO2) were investigated. When small amount of CaF2 was added, the density of the composites was markedly enhanced. The reactions of HA with CaF2, which led to the formation of fluorapatite (FA), were attributed to the observed improvements in densification. When HA-20-vol%-ZrO2 composites were sintered, with the addition of 5 vol% of CaF2, in air at 1300°C, the density of the specimen approach ed 98% of the theoretical value. The flexural strength and fracture toughness of the composites were also improved, as a result of the enhanced densification.
|Number of pages||3|
|Journal||Journal of the American Ceramic Society|
|Publication status||Published - 2002 Jun|
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry